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(Assessment of) NONPOINT SOURCE POLLUTION For The State Of SOUTH CAROLINA tJ TD April, 1989 181 (3. S6 'uth Carolina Department of Health and Environmental Control A87 Bureau of Water Pollution Control 2600 Bull Street ri Columbia, SC 29201 rJ ASSESSMENT OF NONPOINT SOURCE POLLUTION STATE OF SOUTH CAROLINA Property of CSC Library SOUTH CAROLINA DEPARTMENT OF HEALTH AND ENVIRONMENTAL CONTROL JUNE 1988 Revised April 1989 Prepared by Bureau of Water Pollution Control Division of Water Quality and Shellfish Sanitation Water Quality Planning and Standards Section c~r-- � U. S. DEPARTMENT OF COMMERCE NOAA COASTAL SERVICES CENTER 2234 SOUTH HOBSON AVENUE CHARLESTON, SC 29405-2413 C0 _ \ v-C" EXECUTIVE SUMMARY This report summarizes existing data concerning nonpoint source impacted waters within the State of South Carolina. It was prepared by the South Carolina Department of Health and Environmental Control in compliance with Section 319 of the Clean Water Act of 1987. Generally, the Assessment is a list of waters, including surface and groundwaters, impacted by Nonpoint Source (NPS) runoff and the NPS category, or source, contributing to these impacts. The surface water list and accompanying information are shown in Table A and the groundwater list in Table B. More than 330 surface waterbodies or portions of waterbodies are estimated to be impacted by NPS pollution. Recent analysis has shown that 8 percent of the State's flowing streams mileage, 9 percent of the coastal saltwater acreage, and less than I percent of the lakes' acreage are not attaining their State classified uses due to nonpoint source pollution. The greatest categorical contributor to surface water NPS is agriculture, with urban runoff following. The groundwater inventory lists 200 incidents of groundwater contamination caused by NPS sources with leaking lagoons, ponds, pits, or tanks mentioned as the most numerous category. The report also addresses such subjects as data gaps, high quality waters, wetlands, and antidegradation. The NPS Assessment is a component of a four year program specified in Section 319. It includes assessment, a Management Program that describes best management practices and the programs to implement them, and the actual implementation of the programs using a combination of federal, State, and local funds. Chapters seven and eight describe the process for selecting the best management practices and summarizes the existing regulatory and i non-regulatory programs currently being implemented by agencies in the State to control NPS pollution. Chapter ten describes the public participation process used during Assessment development. Section 319 specifies that other groups with water quality and resource interests be actively involved in the process of identifying NPS water quality problem areas, identifying the sources impacting these waters, and identifying the best management practices (BMPs). The Law also requires that the State issue a public notice on the availability of the Assessment Report for public review and provide an opportunity for public comment prior to submitting the Report to the Environmental Protection Agency. TABLE OF CONTENTS Chapter Page Executive Summary ..................... i Table of Contents ...................... iii List of Tables and Figures ................ iv Introduction ....................... I I Results of Surface Water Assessment ............ 4 2 Surface Water NPS Methodology ............... 19 3 Groundwater Assessment .................. 25 4 Data Gaps ..... . .................. 36 5 Identification of High Quality Waters ........... 40 6 Special Concerns ..................... 43 7 Process for Defining Best Management Practices ...... 49 8 State and Local NPS Programs ............... 53 9 Future Processes ..................... 77 10 Public Participation ................... 80 Appendix I NPS Water Quality Parameters Appendix II Nonpoint Waterbody Survey Forms Appendix III Public Notice Appendix IV NPS Runoff Model Methodology LIST OF TABLES Table Paqe Table A (South Carolina Waterbodies Impacted by NPS Pollution) 9 Table B (Sources of Incidents of Groundwater NPS Pollution) . . . 29 Table C (High Quality Waters) ................. 41 Table D (NPS Task Force) .................... 81 LIST OF FIGURES Figure 1 (Watershed Identification Map) ............. 5 iv INTRODUCTION Nonpoint source (NPS) pollution in South Carolina may be described as pollution contained in stormwater runoff from land surfaces. The pollution can impact the State's surface and groundwaters. It emanates from diffuse sources in contrast to "point source" pollution which is discharged from a pipe into a waterbody. Typical examples of sources which contribute to nonpoint source pollution include runoff from agricultural land, urban areas, construction sites, logging roads, failing individual sewage treatment and disposal systems, abandoned mines, etc. The most common NPS pollutants include sediment, nutrients, and fecal coliform bacteria. Historically, emphasis for pollution control has been on regulation of point sources; however, recent legislation has renewed emphasis on addressing nonpoint source pollution control as an effective measure to improve and protect water quality. The Clean Water Act (CWA) of 1987 reauthorized a similar law which was passed in 1977. One of the main differences between these Acts is the emphasis the 1987 CWA puts on nonpoint source pollution control as well as conventional point source control. According to Section 319 of the CWA, each state must develop strategies for managing nonpoint source pollution. In South Carolina, the S. C. Department of Health and Environmental Control (DHEC), has been designated lead agency for nonpoint source pollution management activities. Two reports must be prepared and submitted to the U. S. Environmental Protection Agency: a Nonpoint Source Assessment and a Nonpoint Source Management Program. 1 The first of these reports, the Nonpoint Source Assessment includes the following items: 1. A list of navigable waters which, without additional actions to control nonpoint source pollution, cannot be expected to support their designated uses. These waters include those which partially or do not support their designated uses because of nonpoint source pollution. In addition, waterbodies of high quality are included as being potentially impacted if effective nonpoint source controls are not implemented. 2. For each waterbody impacted by nonpoint source pollution, an identification of the source(s) (e.g., agriculture, urban, etc.) of such pollution. 3. A description of the process, including intergovermental and public participation, by which BMPs are identified and selected. 4. An identification and list of State and local programs for controlling nonpoint source pollution. This report addresses those four subjects. Protection of existing waterbody uses and maintaining water quality to support those uses is the objective of DHEC and the aim of the CWA Nonpoint Source Management Program. Further degradation of waterbodies by either point or nonpoint sources of pollution allow further degradation of waterbodies by either point or nonpoint sources of pollution. If nonpoint sources of pollution are inhibiting any of the State's waters from being used for their intended designation, then controls must be implemented to prevent further degradation. Most point source control strategies are integrated with the assimilative capacity of the waterbody. In other words, how much waste can the stream assimilate without degrading water quality to the extent that aquatic life is 2 impacted or a use is no longer attainable? In contrast, nonpoint source control strategies are based on installation and implementation of best management practices (BMPs). Each BMP is based on a particular technology which (in theory) should protect the designated uses of the waterbody. In assessing statewide NPS impacted waterbodies, several sources of data and information were utilized. Monitored data from the Department's network surface water trend sampling network was examined. Information regarding locations of NPS impacted waterbodies was solicited from other agencies, groups, and individuals. Information on potentially impacted waterbodies was analyzed using a computer model. NPS assessment is expected to be a continuing effort. Over the four-year period, updated information will be gathered, assessed, and reported in the annual NPS program reports. This information will also in incorporated into the State's Water Oualitv Assessment (305b Report). CHAPTER I RESULTS OF SURFACE WATER ASSESSMENT Table A presents the general results of the surface water NPS Assessment. An explanation of the abbreviations used can be found in the legend that precedes the table. Various columns in the table include: watershed, waterbody, county, monitoring station number, NPS category, parameters of concern, data source, standard violations, and additional comments. The legend also gives an explanation of the data type contained in each of the columns of the table. Table A is arranged by watershed according to EPA guidance. The watershed identifier is the standardized federal eight digit hydrologic unit code as shown in Figure 1. The code represents region, subregion, accounting unit, and cataloging unit. The smallest watershed unit that is depicted in Figure I was not employed in Table A. A total of 336 waterbodies were identified as NPS pollution problem areas. Data from DHEC's surface water quality sampling network was utilized in identifying 71 percent of these areas. Additional sources of data included: DHEC Environmental Quality Control Districts, interested public, S.C. Land Resources Conservation Commission computer modelling, S.C. Water Ouality Assessment 1984-1985 [305(b) Report], America's Clean Water. the State's NonDoint Source Assessment 1985. ADoendix, and the National Estuarine Inventory - National Coastal Pollution Discharae Inventory. Column 7 in Table A lists the specific data source for each identified waterbody. The data collected from DHEC's surface water quality sampling network was considered to be "monitored," and all other data "evaluated." Of the 336 probable NPS problem areas listed, 35 percent were solely based on monitored 4 LEGEND FOR TABLE A Column 1 - Watershed The standard federal eight digit hydrologic unit was selected as the watershed designation for the assessment. Column 2 - Waterbody The name of the body of water, i.e., stream, river, lake, wetland, etc. that evidences real or potential adverse impacts due to NPS contributions. Column 3 - County The South Carolina county or counties in which the problem waterbody lies. Along with the watershed identifier, it defines the location of the waterbody. Column 4 - Station # The DHEC surface water quality sampling station identification number. Column 5 - NPS Category NPS Category represents the source of pollution affecting the problem waterbody. Category number designations are taken directly from EPA guidance: 11 - Agriculture: Non-irrigated crop production 12 - Agriculture: Irrigated crop production 13 - Agriculture: Specialty crop production 14 - Agriculture: Pastureland 18 - Agriculture: Animal holding/management 21 - Silviculture: Harvesting, reforestration, residue management 31 - Construction: Highway/road/bridge 32 - Construction: Land development 41 - Urban Runoff: Storm sewers 43 - Urban Runoff: Surface runoff 58- Resource Extraction: Abandoned gravel, sand, and clay mines 65 - Land Disposal: Individual sewage treatment and disposal systems 71 - Hydrologic/Habitatal Modification: Channelization 80 - Other 90 - Source Unknown Column 6 - Parameters of Concern The specific water quality indicators of NPS pollution. The waterbodies listed have exhibited exceedences of specific guidelines or standards of one or more of the parameters shown: FC - Fecal Coliform Bacteria DO - Dissolved Oxygen TX - Toxic materials such as heavy metals or pesticides SS - Suspended Solids NT - Nutrients (phosphorus and/or nitrogen) pH TB - Turbidity BO - Biological Oxygen Demand (BOD,) AM - Ammonia An S in a parameter column indicates scattered exceedences of a particular parameter, N indicates numerous exceedences, and U indicates undetermined. Column 7 - Data Source Several sources were utilized to identify NPS problem waterbodies for purposes of the assessment: I - DHEC's surface water quality sampling network of 543 stations. This data was retrieved form the STORET network. !I - Problem locations supplied by DHEC District Engineers. III - Problem locations supplied by the interested public including environmental groups and water based recreation groups, etc., such as USDA Soil Conservation Service Conservation, Soil Conservation Districts, S. C. Coastal Council, S. C. Wildlife and Marine Resources Department. IV - Computer modelling results by S.C. Land Resources Conservation Commission indicate high potential for NPS problems in the agriculture, urban runoff, or surface mining categories. V - S.C. Water Duality Assessment 1984-1985 [305(b) Report]. VI - Data contained in America's Clean Water. the State's Nonooint Source Assessment 1985 ADDendix produced by ASIWPCA. VII - Data contained in the National Estuarine Inventory - National Coastal Pollution Discharcie Inventory by the National Oceanic and Atmospheric Administration. Column 8 - Monitored/Evaluated This denotes whether a problem waterbody was selected based on monitored or evaluated data. 7 Column 9 - Standards Violations The State of South Carolina has set water quality standards for three of the parameters listed in the assessment; dissolved oxygen, fecal coliform bacteria, and pH. This column denotes at which waterbody one or more of these parameters had standards violations. For purposes of this Assessment, measurements of the three parameters were summed for the last two-year period of record. If 50 percent or more of the measurements exceeded the criteria of the parameter for the classification of the waterbody it was considered to be in violation of State Water Quality Standards. *Column 10 -.Additional Comments Sel f-explanatory. TABLE A SOUTH CAROLINA WATERBODIES IMPACTED BY NPS POLLUTION NONIPOINT SOURCE ASSESSMENT I I I I ~~NPS II II DATA I MONITORED/ I STDS. IADDITIONAL WATERSHED I WATERBODY I COUNTY ISTATION IICATEGORYII PARAMETERS OF CONCERN II SOURCE IEVALUATED I VIO. ICOMMENTS I I I I ~~~~~~~~~~~II FC I DO I TX I SS I NT I pH I TB I BO I AM III I 03040201 BIG SWAMP FLORENCE PD-168 11 II S N N S S ISIi I II DO I 03040201 BLACK CREEK DARLINGTON B D-021 111,41,4311 IS S N II I,III,IV M,EI 03040201 BLACK CREEK DARLINGTON PD-025 11 II S N N II I,IV M,E IALSO PT SOURC� 0304020 1 CATFISH CANAL HAHION PD-321 111,41,431l S IS S I S II 1 I I,IV M ,EI 03040201 CATFISH CANAL e ARION PD-097 111,41,4311 N N IS II I,IV N,E D 03040201 CROOKED CREEK MARLBORO PD-107 111,41o4311 S N I N II I,IV B ,EI 0304001 1 JEFFRIES CREEK FLORENCE P0-256 11,58 1 I N N II I,III,IV M,EI 03040201 JEFFRIES CREEK DARLINgTON PD-2SS 11 II N N31R I I I B O 0304020 1 LAKE ROBINSON DARLINgTON PD-266 I I1N I N It I,IV N ,E 0304020 1 LYNCHES LAKE FLORENCE PD-OBGA 111,41,431 1 N H S III I II I I M ID IALSO PT SOURCE 03040201 MIDDLE SNANP FLORENCE PD-230 11 II IN S S It I 03040201 PEE DEE RIVER FLORENCE PD-076 11 I S S S N II I,III,IV M,E 03040201 B EE DEE RIVER DARLINGTON B D-020 11,13 11IS S S N II I H 03040201 PEE DEE RIVER MARLBORO PD-015 1 1,12 11 I I I IN N It I,IV H ,E 0304020 1 PEE DEE RIVER NARLBORO PD-012 11,12 1 S S S S IN i I,II I M,E 03040201 PEE DEE RIVER FLORENCE PD-23� 11 IIIN S S II I,IV M,E 03040201 PRESTWOOD LAKE DARLINGTON IPD-268 141,43 1 N N II I B pH 03040201 SNAKE BRANCH DARLINGTON PD-258 41,43 11S S N . I S S II I e 03040201 SNAKE BRANCH DARLINGTON PD-137 41,43 N1)A) I I I I I B 03040201 THOMPSON CREEK CHESTERFIELD 11 IIIU U III,IV E 0304020 1 THREE CREEKS MARLBORO 111,21,3111 U U IllI I I II E 03040202 BIG SNAMP FLORENCE P9-169 11 IIS N N 9 S S II I M IALSO PT SOUSCE 03040202 LICK CREEK LANCASTER PD-329 1 1,14 11N I I M 03040202 LITTLE FORK CREEK CHESTERFIELD PD-215 11 IIN I H I I I 03040202 LITTLE LYNCHES RIVER LANCASTER PD-006 11 I N IS S S I M I 03040202 LITTLE RIVER NORRY MDn-162 41,43 11 I IS S I INI ,III M,E 03040202 LYNCHES LAKE FLORENCE PD-087 ll I N N S I I I,VI M,E Op 03040202 LYNCHES LAKE FLORENCE PD-085 111,41,43l1 N N S S I HII I II ID 03040202 LYNCHES RIVER LEE 111,41,4311 U U U U U I I III E 03040202 LYNCHES RIVER FLORENCE PD-041 11 IIIS I I I,IV M,E 03040202 LYNCHES RIVER KERSHAW PD-080 11 I)S S I I S M 03040202 LYNCHES RIVER FLORENCE PD-281 11 I S IolI I I ,V N ,E 03040202 LYNCHES RIVER CHESTERFIELD PD-113 i1 I N N INI I,IV,V M,E 03040202 LYNCHES RIVER KERSBAW PD-009 11 IIS N I I I M 03040202 LYNCHES RIVER KERSHAW PD-066 11 IIS N I I I I i ,III M,E 03040202 S BR WILDCAT CREEK LANCASTER P0-180 14 N1 N I M I I 03040202 SPARROW SWAMP DARLING~ON PD-072 11 II IN N S II ,III,IV N,E Op 03040202 TODD BRANCH LANCASTER PD-005 41,43 11N N S I I I 1 M 03040202 W BR WILDCAT CREEK LANCASTER PD-179 14 1 N N I I I In 03040204 BEAVERDAn CREEK DILLON PD-310 11 I N IN S II I H DO,pH 03040204 CHINNERS MILL BRANCH RORRY PD-177 11 I N I M I 03040204 LAKE SWAMP HORRY PD-176 1 1,18 N1IA N S II ,IV M,E 03040204 LITTLE PEE DEE RIVER MARION PD-189 11 II iS S N I I I,IV M,E TABLE A (Continued) NONPOINT SOURCE ASSESSMENT INPS II II DATA I MONITORED/ I STDS. I ADDITIONAL WATERSHED I WATERBODY I COUNTY ISTATION 1ICATEGORYII PARAMETERS OF CONCERN II SOURCE I EVALUATED I VIO. I COMMENTS I I I I II FC I DO I TX I SS I NT I pH I TB I BO I AM II I I I 030402041 LITTLE PEE DEE RIVER DILLON I PD-069 I 11,21 I1 I I I IN I N I I IS II I,III,IV,VI I M,E I pH 03040204 1 LITTLE PEE DEE RIVER MARION I PD-053 11 HI I S 1 I N I S I S II 1,III,IV I M,E 03040204 I LITTLE PEE DEE RIVER DILLON I PD-029E I 11 II I N I N II I,III,IV M,E 03040204 I MAIDEN DOWN SWAMP MARION I PD-190 11 II I N I N I I I I II I I DO 030402041 McLAURENS MILL POND MARLBORO I PD-17A 11 II I N I I I I I I i II I M 03040204 I PANTHER CREEK MARLBORO IPD-306 11 II IN I I IN II I M 03040205 I BIRCH CREEK I WILLIAMSBURG I PD-213 111,18 II S I S I I I N I I I I II I I M 030402051 BLACK MINGO CREEK GEORGETOWN I PD-172 11 II IS IS I N I I I I II I M DO 03040205 I BLACK RIVER LEE I PD-186 111,41,4311 5 I S I U I U I N IS I U I I ii 1,III I M,E 03040205 I GREEN SWAMP SUMTER IPD-039 111,41,4311{ IS i I I I I I I II I I M 03040205 1 POCOTALIGO RIVER SUMTER I PD-091 111,41,4311 S I S IS NI IN II I M IALSO PT SOURCE 03040205 I POCOTALIGO RIVER CLARENDON I PD-1u 11 II I N I N I S II I M DO I 03040205 I POCOTALIGO RIVER SUMTER I PD-202 111,41,4311 I N IS I N I S I N II I M I DO,pH IALSO PT SOURCE 03040205 I PUDDING SWAMP I WILLIAMSBURG I PD-203 I 11 II I S I N I S II I,IV M,E I 03040205 I ROCKY BLUFF SWAMP SUMTER I PD-201 I 11 II I S I I N IN II I I MFC,DO,pHI 03040205I SCAPE ORE SWAMP LEE I 111,43 II U IU U IU I I IU I I II III,IV E o 03040205 I TURKEY CREEK SUMTER IPD-098 111,41,4311 N S I N I IS I S II I I FC 03040206 I CRABTREE CREEK HORRY I MD-158 111,41,4311 { N I I I N I I S I I II I I M I FC,DO 03040206 I INTRACOASTAL WATERWAY HORRY I MD-085 I 41,43 II S I N I I I N I I S I I II I,II,VI I M,E 03040206 I INTRACOASTAL WATERWAY HORRY I MD-08 I 41,43 II S I N I I I I I I II I I FC 03040206 I INTRACOASTAL WATERWAY HORRY IMD-087 I41,43 i S IN I I I IS I I I II I I FC 03040206 I INTRACOASTAL WATERWAY HORRY I MD-127 141,43 II i N I S I I I S I I I S II I I M 03040206 I INTRACOASTAL WATERWAY HORRY I MD-089 I 41,43 II S I N I I I IS I I I II I i M 03040206 I KINGSTON LAKE HORRY I MD-107 I 41,43 II N I N I I I N IS I I I II I I M IFC,DO,pHl 03040206 I WACCAMAW RIVER HORRY I MD-136 111,18,4311 I N I I I I S I I I 11 I I M 03040206 I WACCAMAW RIVER HORRY I MD-ill 111,18,4311 I N I I I N I S I I I II I I H pH 03040206 I WACCAMAW RIVER HORRY I MO-l1 111,18,4311 { N I N I S II I,III,VI M,E 03040207 I ATL SURF-CMB OUTFALLS HORRY I 41,43 II I I I I I I I I II III I E 81 OUTFALLS 03040207 1 ATL SURF-NMB 27 AVE S HORRY I 41,43 I I I I I I I I II III E 030402071 ATL SURF-NMB 7 AVE S HORRY 141,43 {I I I i I I I I I II III E 03040207 IATL SURF-NMB MAIN STREET I HORRY I 41,43 {I I I i I I i I I II III I E 03040207 IATL SURF-SURFSIDE 5 AVE SI HORRY I 141,43 {I I I I I I I I I II III I E 03040207 IATL SURF-SURFSIDE 7 AVE NI HORRY I 41,43 II I I I I i I I I II III I E 03040207 ICANE PATCH SWASH-ATL SURFI HORRY I 41,43 II I I I I I I I I II III E 03040207 I HOG INLET I HORRY 141,43,7111 U I I I I I I I I II III E 3 CANALS 03040207 I INTRACOASTAL WATERWAY { HORRY I MD-091 111,41,4311 S I N I I I I I S I I II I I M I FC 03040207 {LITTLE R INLET-DUNN SOUNDI HORRY I I 90 II U I I I I I I I I II III I E I ISHELLFISH PROHB 03040207 I MIDWAY INLET INTERIOR GEORGETOWN 141,43,6511 U I I I 1 I I I I II III I E I ISHELLFISH PRONB 03040207 I MURRELLS INLET GEORGETOWN 141,43,7111 I I I I I I I I II III I E I I MARINAS 03040207 I NORTH INLET I GEORGETOWN I 141,43,7111 { I I I I I I I II III I E I IDEBIDUE CANALS 03040207 I PAWLEYS INLET INTERIOR GEORGETOWN 141,43,6511 U I I I I I I I I II III I E 03040207 I SAMPIT RIVER GEORGETOWN I 141,43,6511 U I I U I U I I I I I II III I E I IALSO PT SOURCE 03040207 I SINGLETON SWASH HORRY 141,43,8011 { I I I I I I I II III I E i I GOLF RUNOFF TABLE A (Continued) NONPOINT SOURCE ASSESSMENT ~ ~ ~ NPS ~ ~l DATA ~ MONITORED! ~ STDS. ~ ADDITIONAL WATERSHED I WATERBODY I COUNTY iSTATION t}CATEGORY{I PARAMETERS OF CONCERN }l SOURCE I EVALUATED I VlO, I COMNENTS I } I I [I FC I DO I TZ I SS { NT } pH I TB I BO I AM II I I I 03040207 TURKEY CREEK GEORGETORN MD-O76N 11 II II I M I 03040207 WHITE POINT SWASH NORRY 41,43 II II III E f 03040207 WINYAH BAY GEORGETOWN 11 II II VII E I 03040207 WITHERS SWASH-ATL SURF HORRY 41,43 {I }1 III E I 03050101 BEAVERDAM CREEK YORK CW-153 14 IIN N S {I IIV ME { 03050101 CROWDERS CREEK YORK CW-023 11,14 {{N N N S II I M FC {ALSO PT SOURCE 03050101 LAKE WYLIE YORK 11,65 {I U U l{ IllIV E I 03050101 TOOLS FORK CREEK YORK CW-212 11 IIN }l I M } 03050103 BEAR CREEK LANCASTER CW-151 11,14 liS S II I M I 03050103 BEAR CREEK LANCASTER CW-131 41,43 IIN S II I M I 03050103 CANE CREEK LANCASTER CW-185 14,58 1{S S }{ IIV ME { 03050103 CATAWBA RIVER YORK 65 IIU U I{ III E }ALSO PT SOURCE 03050103 FISHING CREEK YORK CW-029 11,14 {I S N l{ IIVVVI ME 03050103 FISHING CREEK CHESTER CW-009 11,14 II N II IIV ME 03050103 FISHING CREEK RESERVOIR CHESTER CW-16F 11,14 IIS It I M 03050103 GILLS CREEK LANCASTER CW-047 41,43 IIN S {I I M 03050103 GRASSY RUN BRANCH CHESTER CW-088 41,43 IIN S S S II I M 03050103 ROCKY CREEK CHESTER CW-002 11,14 II II IolV ME 03050103 STEEL CREEK YORK CW-011 14 IIN S II I M 03050103 STEEL CREEK YORK CW-009 14 IIN S S II I M 03050103 TWELVE MILE CREEK LANCASTER CW-083 14 IIS N II I N 03050103 U.T. TO CATAWBA RIVER YORK CW-221 41,43 IIN II I M FC 03050103 WILDCAT CREEK YORK CW-006 41,43 IIN N il I M 03050104 KE~Y CREEK KERSHAW CW-154 75 II N II I M AB'D IND. PIT 03050104 LAKE WATEREE FAIRFIELD CW-208 11,14 II S N S S {I IVI ME 03050104 LITTLE WATEREE CREEK FAIRFIELD CW-040 14 IIN N S II I M 03050104 WATEREE RIVER KERSHAWSUMTERI 111,14,3211 U U II III E 03050105 BROAD RIVER CHEROKEE B-044 111,13,14ll N N N S N II I M 03050105 BROAD RIVER CHEROKEE B-043 {11o13,141l N N N {I IIV ME 03050105 BROAD RIVER CHEROKEE B-042 }11,13,1411N N N II IIIIVI ME 03050105 BRUSHY CREEK GREENVILLE BE-009 I 41,43 II N N II I M 03050105 BULLOCKS CREEK YORK B-159 I 11,14 II N S II IIV ME 03050105 CHEROKEE CREEK CHEROKEE B-056 111,14,321l S II IIV ME 03050105 }HEADWATERS OF LAKE BOWEN SPARTANBURG B-302 111,13,321i N II IIV ME 03050105 LAKE WELCHEL CHEROKEE 111,14,43ll II III E 03050105 LAWSONS FORK CREEK SPARTANBURG {11,32,43ii U II IIIIV E iALSO PT SOURCE 03050105 LIMESTONE MILL CREEK CHEROKEE B-128 I 41,43 i{ N II I N 03050105 LITTLE BUCK CREEK SPARTANBURG B-259 I 14 II S II I M 03050105 MIDDLE TYGER RIVER GREENVILLE B-148 I 11 }l N N N l{ I M 03050105 NORTH PACOLET RIVER SPARTANBURG B-026 111,13,321{ N N N l{ IIV ME 03050105 PACOLET RIVER SPARTANBURG BP-001 111,13.321t S S II IIV ME 03050105 PACOLET RIVER SPARTANBURG B-028 111o1J,3211 N II IIV ME 03050105 POTTER BRANCH SPARTANBURG B-191 111,13,141{ N II I M TABLE A (Continued) NONPOINT SOURCE ASSESSMENT t~ I I I NPS II II DATA I MONITORED/ I STDS. I ADDITIONAL WATERSHED I WATERBODY I COUNTY ISTATION ItlCATEGORYII PARAMETERS OF CONCERN II SOURCE I EVALUATED I VIO. I COMMENTS II FC I DO I TX I SSNTpHIT I NT I p I TB i 80 I A III 03050105 1 SPIVEY CREEK I SPARTANBURG I B-103 I 11,14 11 I I I I I I N I I II I I M I I 03050105 1 THICKETTY CREEK I CHEROKEE I 8-062 111,14,3211 S I I I I S I I S II I,IV I NE I 03050105 1 THICKETTY CREEK I CHEROKEE I B-133 111,14,3211 N I I N II ,IV I H E I 03050105 1 TYGER RIVER I SPARTANBURG I 8-008 I 11 II N I I I I I I I I N II I,VI I ME I IALSO PT SOURCE 03050106 1 BROAD R DIVERSION CANAL I RICHLAND I 8-080 1 41,43 I N I IN I I N I I N I IN II 1,111 I E I 03050106 1 BROAD RIVER I NEWBERRY I 8-047 11,14,1811 N I I I I N I I I I II I I M I 03050106 1 BROAD RIVER I FAIRFIELD I 8-236 1 11,14 11 I I N IS I N I I N I I N II I I K I 03050106 1 BROAD RIVER I UNION I B-046 1 11,14 11 N I IS I I N I I N I S IN II I I I 030501061 CRANE CREEK I RICHLAND B-316 141,43 IIS I I I I I I I II I I M I 030501061 DRY FORK CREEK I CHESTER B-074 I 41,43 11 N I I I NI I N I II I I M I 03050106 1 DRY FORK CREEK I CHESTER I B-073 I 41,43 11 N I I I I N I I N I I II I I M I 03050106 1 JACKSON CREEK I FAIRFIELD 114,32,4311 I U I I I I I II III I E I 030501061 LITTLE RIVER I FAIRFIELD 8-145 1 14,58 11I I I I N I IN I I I,IV I ME I 03050106 1 MENG CREEK I UNION 8-064 1 41,43 )IN I I I I I I I I II I I I 030501061 ROSS BRANCH I YORK B-086 1 41,4311N1 I I I N I I N I II I I M I I 03050106 1 SANDY RIVER I CHESTER I B-075 111,14,5811 N I I N I I ,I I ME I I 03050106 1 SMITH BRANCH I RICHLAND I B-280 I 41,43 11 N I N I I N I I N I N I N II IV I ME I FC 03050106 1 WINNSBORO BRANCH I FAIRFIELD 8-123 I 41,43 If N I I I I N I I I I II I I M FC 03050107 I ENOREE RIVER I SPARTANBURG I BE-018 111,13,1411 I I I I N I I N I I II I I N I IALSO PT SOURCE 03050107 1 ENOREE RIVER I NEWBERRY I 8-054 111,13,1411 N I IN IN I N I I N I I N II I I I 03050107 1 FAIRFOREST CREEK I SPARTANBURG 8-020 114,32,4311 N I I I I N I I I I II I,IV I ME I FC 03050107 1 KELSEY CREEK I SPARTANBURG I 8-235 I 41,43 11 N I I I I I I I I II I I N I 030501071 MITCHELL CREEK I UNION B-199 I 14 11 N I I I IN I IN I I II I I N I 03050107 1 SOUTH TYGER RIVER I SPARTANBURG 8-263 111,14,4311 N I I I I N I I I I II ,IV I ME I IALSO PT SOURCE 03050107 1 SOUTH TYGER RIVER I GREENVILLE 8-317 I 14 11 N I I I I N I I N I I II I,IV I ME I 03050107 1 TYGER RIVER I SPARTANBURG I 8-162 111,14,3211 N I I I I N I I N I S I II I,III,IV I M,E I 03050107 IU.T. TO FAIRFOREST CREEK I SPARTANBURG I B-242 1 41,43 11 I I I I N I I N I I II I I M I 030501081 BEARDS CREEK I LAURENS 8-231 111,14 11 I 1 I I I I I I II I I M I 03050108 1 BRUSHY CREEK I GREENVILLE I BE-035 1 41,43 11 N I I I I S I I S I I II I I M I 03050108 1 DURBIN CREEK I GREENVILLE B-097 111,14 11 N I I I I N I I N I I II I,IV I NE I 03050108 1 ENOREE RIVER I SPARTANBURG I 8-037 111,14 11 I I I I N I I N I I II I,III,IV I MNE I IALSO PT SOURCE 03050108 1 ENOREE RIVER I SPARTANBURG I BE-024 111,14 11 N I I I I N I I N II I,IV ,I E I IALSO PT SOURCE 03050108 1 ENOREE RIVER I SPARTANBURG I 8-041 111,14 11 I IN I I N I I N I N II I,V I ME I IALSO PT SOURCE 03050108 1 ENORRE RIVER I GREENVILLE I BE-015 111,14,5811 I I I 1 N I I N I I II I,IV I ME I IALSO PT SOURCE 03050108 1 GILDER CREEK I GREENVILLE I BE-040 111,14,4311 N I I I I S I I S I I I,IV I ME 03050108 I HORSE PEN CREEK I GREENVILLE I BE-020 111,13,1411 N I I I I N I I I I II I I N I IALSO PT SOURCE 03050108 1 MILL CREEK SPARTANBURG 8-038 1 11,14 I N IN I I I N I I I N II I M I 1 030501081 ROCKY CREEK I GREENVILLE IBE-007 1 41,43 11 N I I I IN I IN IN II I I M I I 03050109 1 BROADMOUTH CREEK I ANDERSON I S-289 111,41,4311 IS I I I I I I I II IIV I NE I 030501091 BRUSHY CREEK I ANDERSON I S-067 1 11,14 ii N I I I I I I I I II I I N I 030501091 BRUSHY CREEK I ANDERSON S-084 1 11,1411 N I I II IN I II I I I 03050109 1 BUSH RIVER I NEWBERRY I S-042 111,14,1811 N I I S I I N I I N I I N II I,III,IV I ME I IALSO PT SOURCE 03050109 I BUSH RIVER I NEWBERRY I S-102 111,14,1811 N I I I IN I I N I I II I,IV I ME I IALSO PT SOURCE TABLE A (Continued) NONPOINT SOURCE ASSESSMENT ~~~~~I I I I NPS II II DATA I MONITORED/ I STDS. I ADDITIONAL WATERSHED I WATERBODY I COUNTY ISTATION tICATEGORYII PARAMETERS OF CONCERN II SOURCE I EVALUATED I VIO. I COMMENTS I I ~ ~ ~ ~~~~~~I I I FC I DO I TX I SS I NT I pHI TB I BO I A III 030501091 CAMPING CREEK I NEWBERRY I 5-290 111,14,1811 I IN I IN I IN I N I I I N I 03050109 1 CLOUDS CREEK I SALUDA 111,13.1811 U I I I U I I II III I E I ALSO PT SOURCE 03050109 1 CORONACA CREEK I GREENWOOD 114,41,4311 U I I IU I I I U I I II III I E I ALSO PT SOURCE 03050109 1 EASTSIDE CREEK I GREENVILLE 132,41,4311 I U I I I U I I II III I E I 030501091 GEORGE'S CREEK I PICKENS I S-063 114,32 1N I I I I I IN I I II I,IV I M,E I 030501091 HARRIS BRANCH I SALUDA I S-293 11,14,1811 N IN I I I I I I I II I I M I 03050109 i KINLEY CREEK I LEXINGTON 1 114,32,4311 I I U I I I I I II III I E I 03050109 1 LAKE GREENWOOD I GREENWOOD 8-131 I 11 II I I I I N I N I I I I N II I,III,IV,VI I ,E I 03050109 ILAKE MURRAY HEAD WATERS I NEWBERRY I S-223 111,14,1811 S I N I S I IS I S I I S IS II I,III,IV,VI I ME I 03050109 I LITTLE RIVER I LAURENS S-034 111,14,4311 N I N I I N' I I S I I II I V I ,E I 03050109 I LITTLE RIVER I NEWBERRY S-099 1 11,14 11 I I I I N I I N I I II I,IV I ,E I 03050109 I LITTLE SALUDA RIVER I SALUDA 111,14,1811 I U I U II I I,IV I E I 03050109 I LORICK BRANCH I LEXINGTON I S-151 I 41,43 II N I I I I I I N I N I II I I ME I 03050109 IMIDDLE BRANCH HEADWATERS I PICKENS 132,43,9011 I I U I I I U I I II Ii I E I 03050109 1 N INE CREEK I SALUDA 111,14,2111 I I U I I I U I I II III,IV I E I I 030501091 NORTH CREEK I LAURENS I S-135 111,14 IIS IN I I I S I N I I I,IV I ,E I 03050109 1 RABON CREEK I LAURENS I S-096 111,14,3211 I S I N II I,IV I ME I 030501091 RAWLS CREEK I LEXINGTON 9 -287 1 41,43 11N I I I I I I ,I I II 1,111 I NE I 03050109 1 REEDY RIVER I GREENVILLE 8-013 111,41.4311 1 I I I N I IN I I N I I,II,IV,VI I NE I 03050109 1 ROCK CREEK I GREENVILLE S-091 111,14,4311 N I I I I S I I I I II 1,111 I ,E I 030501091 ROCKY RIVER I ANDERSON ISV-031 1 41,43 11 I IN I I I IS I IN II I I M I 03050109 1 SALUDA RIVER I GREENWOOD I S-186 I 11,14 11 I I S I I N I I S I I I II I,IV,VI I ,E I 03050109 1 SALUDA RIVER I GREENVILLE I S-007 111,14,4311 S I I I I N I I N II I,II,IIIIV I ,E I 03050109 1 SALUDA RIVER I LAURENS I S-125 1 11,14 11 I I N I I I I N I I N II I,III,IVVI I ,E I 03050109 1 SALUDA RIVER I PICKENS I S-250 114,32,4311 { N I N II I,IV I ME I 03050109 1 SALUDA RIVER I LEXINGTON I S-149 114,41,4311 { I I I I N I,II I ,E I IALSO PT SOURCE 03050109 1 SCOTT CREEK I NEWBERRY I S-044 1 41,43 II N I I I I N I I I I I I I M I FC 03050109 1 U.T. TO ENOREE RIVER I GREENVILLE IBE-O01 I 41,43 11 I I N I I I I N I I II I I M I 030501091 WEST CREEK I SALUDA I S-051 111,14,1811 S I I I I I I I I II I I M I 03050110 1 BROAD-SALUDA-CONGAREE I RICHLAND ICSB-O1L,RI 41,43 II N I IS I I N I I S I I I ,III I .E I 030501101 CEDAR CREEK I RICHLAND I C-069 I 14 11 S I I I I I I I I II I I M I 03050110 1 FOREST LAKE I RICHLAND I C-068 { 41,43 11 I I I I I I S I I N II I I M I 03050110 1 GILLS CREEK I RICHLAND I C-001 I 41,43 11 N I I I I N I I I I II I,III,VI I ,E I 030501101 MILL CREEK I RICHLAND I C-021 I 90 11 I I I I I I I I I I I M I pH 03050110 1 RED BANK CREEK I LEXINGTON I C-067 111,13,5811 } I I I I S I I I II I,III,IV I ,E I 03050110 1 SAVANNAH BRANCH I LEXINGTON I C-0611 41,43 11 I I I I N I N I I I II I I I 03050111 1 HALFWAY SWAMP I CALHOUN I C-058 111,43 1II S I I I IN IS I S IN I II I I M I 03050111 1 LAKE MARION I CLARENDON IST-024 111,12,1311 1 IS I I IS I I IN II I,IIIII,IV I ME I I POT. TOXICS 03050111 1 TAW CAW CREEK I CLARENDON I ST-018 1 41,43 II N I S I I I I I I IS I II I I M I FC,DO 030501121 SANTEE RIVER I BERKELEY I ST-001 I 11 II I N I IS I IS I I II I,VII I ME I 03050112 1 SOUTH SANTEE RIVER I GEORGETOWN I MD-639B I 11 ii N I I I I I I I I II I I M I 03050201 1 COOPER RIVER I BERKELEY I 11,90 11 I I I U I I I I I II III I E I 03050201 1 COOTER CREEK I CHARLESTON IMD-199 90 IN I S I I IN I I I N II I I N I I TABLE A (Continued) NONPOINT SOURCE ASSESSMENT ~ ~ ~ NPS II I DATA I MONITORED/ I STDS. ADDITIONAL WATERSHED I WATERBODY COUNTY ISTATION tlCATEGORYII PARAMETERS OF CONCERN II SOURCE EVALUATED I riO. COMMENTS ~ ~ ~ ~~~~~~i FC I DO I TX J SS [ NT I pH I TB I BO I AN ~ I 03050201 EAGLE CREEK DORCHESTER ICSTL-099 1 41,43 II N II I M 03050201 FOSTER CREEK CHARLESTON 143,63,6511 U U U II II E 03050201 GOOSE CREEK BERKELEY M o-114 I 41,43 II S N S N N II I,VI M,E DO 03050201 LAKE HOULTRIE BERKELEY I 90 II U II III E 03050201 NEWMARKET CREEK CHARLESTON 1 41,43 1l I ]II 1 I I III E DRAINS JUNKYD 0305020 1 POPPERDAM CREEK CHARLESTON [ 32,41,43[[ [[ I I I II I E 030502011 SHEMI CREEK CHARLESTON MD-071 I 41,43 [I S IS1 S S It I,V H ,E 03050201 WANDO RIVER CHARLESTON [ 32,41,431[ U U U [[ I I I II E 03050202 ABHAPOOLA CREEK CHARLESTON 1 111,13,6511 II III E 03050202 ASHLEY RIVER CHARLESTON nD-052 I 41,43 I1 I S S S I[ I M IALSO PT SOURCE 03050202 ASHLEY RIVER CHARLESTON MID-049 I 41,43 II S IS I S IS IS II I M IALSO PT SOURCE 03050202 ASHLEY RIVER CHARLESTON MD-034 1 41,43 ][ S S N II I,II M,E IALSO PT SOURCE 03050202 ATL SURF-FOLLY BEACH CHARLESTON 65 [~ U [ I III E 03050202 BRICKYARD CREEK CHARLESTON I 41,43 11 I I I I I II II IJII E I DRAINS IND PK 03050202 CHANDLER CREEK DORCHESTER 1 41,43,7111 II I I 1 ll i I EI 03050202 CHARLESTON HARBOR CHARLESTON M D-165 I 41,43 11 S S S III,II,III,VlII M,E IALSO PT SOURCE 03050202 CLARK SOUND CHARLESTON I80 11I I I I I II III i I SPOIL RUNOFF 03050202 CONCH CREEK CHARLESTON 1 32,41o43ll U II II g I 03050202 COPAHEE SOUND CHARLESTON 132,41,43ll U II II g I 03050202 ELLIOT CUT CHARLESTON nD-025 I 41,43 1II S S II I M IALSO PT SOURCE 03050202 FOLLY RIVER CHARLESTON 113,43,6511 U U U II II E 03050202 HAMLIN CREEK CHARLESTON 1 32,41,4311 U II II E 03050202 HAMLIN SOUND CHARLESTON 132,41,4311 U II II E 03050202 INLET CREEK CHARLEETOH 132,41,4311 U ItII I I I I I I II E 03050202 JAMES ISLAND CREEl< CHARLESTON M D-122 I 41,43 I I S II I M 03050202 JEREMY CREEK CHARLESTON 141,43,65l{ U U I I II E 03050202 KIAWAH RIVER CHARLESTON {11,13,43{} U U U {{ I I I II,IV E 03050202 SAWMILL BRANCH DORCHESTER 132,43,71ll 1 I I I II III E 03050202 STONO RIVER CHARLESTON MDn-026 113,32,4311{ S S S S {~ I,II,III,IV M,E I ALSO PT SOURCE 03050202 SWINTON CREEK CHARLESTON 132,41,43i1 U II I I 1 1 II E 03050202 WAPPO0 CUT CHARLESTON 41,43 I{ {{ I I I I III E 03050202 WASSAMASSAW SWAMP BERKELEY {CSTL-063 90 11 N N N {~ I,V M,E DO 03050203 BULL SWAMP CREEK LEXINGTON E-034 11,32 {{ N N N {{ I I I,IV M,E DO,pH 03050203 L IGHTWOOD KNOT CREEK LEXINGTON E-101 11 {{ S S {{ I I I I I M 03050203 N FORK EDISTO RIVER ORANGEBURG E-007 111,41,43{{NI I I N N I{ I,II,IV M.nE 03050203 H FORK EDISTO RIVER AIKEN E-091 1 1,13 {~ N S N {{ 1NI I,IV,VI M ,E FC 03050203 N FORK EDISTO RIVER ORANGEBURG E-092 11,12 {{ S N N {{ I,IV M ,E 03050203 N FORK EDISTO RIVER ORANGEBURG E-099 11,12 I1 I IS I N I N II l,IV M,E pH 03050204 FIRST BRANCH EDGEFIELD E-O001 41.43 It S S II I M FC,pH LIMITED DATA 03050204 G OODLAND CREEK ORANGEBURG E-036 11 {{I S {{ I,IV M,E 03050204 S FORK EDISTO RIVER AIKEN E-090 111,13,58{{ 1 I S S R { ~ IolV M,E 03050205 BOHICKE? CREEK CHARLESTON MD-195 113,32,4311 S S S N II l. IV M,E FC,DO 03050205 CHURCH CREEK CHARLESTON 1 11,13,65ll U II II E TABLE A (Continued) NONPOINT SOURCE ASSESSMENT [ I [ [ ~~NPS II [[ DATA [ MONITORED/ [ STDS. IADDITIONAL WATERSHED I WATERBODY I COUNTY ISTATIOR tlCATEGORYII PARAMETERS OF CONCERN II SOURCE IEVALUATED I VlO. ICOMMENTS I I I I I1 ~~~~~~IFC IDO ITX ISS INT IpH I TB I BO I An IIIII 03050205 D AWHO0 RIVER CHARLESTON MO-120I 13 1 I S S S II I M 03050205 EDISTO RIVER DORCHESTER E-014 I 11,13 11 I S N II I,III,VI M ,E 03050205 EDISTO RIVER ORANGEBURG E-013 111,13,1811 N S II I M 03050205 EDISTO RIVER DORCHESTER E-015 I 11,13 11 I I I I N II I M 03050205 FICKLING CREEK CHARLESTONI 13 1 I U U II I X E 03050205 FISHING CREEK CHARLESTONI 65 1 I O U II II E 03050205 LEADENHAH CREEK CHARLESTON I13 11I U U I I II E 03050205 POLK SWAMP DORCHESTER E-D18 111,13,4311 N N N I I I M I ALSO PT. SOURCE 03050206 FOUR HOLE SWAMP ORANGEBURG E-059 {11,18,3211 1 S N {{ I,III,IV M ,E 03050206 GRAMLING CREEK ORANGEBURG R-022 111,13,1811 S N I I I M 03050206 PROVIDENCE SWAMP ORANGEBURG E-OS1 111,13,1811 N N N II I M DO 03050207 LITTLE SALKEHATCHIE R COLLETON I 11,21 1 U {I IllI I J,IV E 03050207 PAWLET'S CREEK GEORGETOWN 141,43,6511 II III E 03050207 SALKEHATCHIE RIVER COLLETON ICSTL-006 1 11,13 11I II I,IV M,E 03050207 SALKEHATCHIE RIVER BARNWELL ICSTL-028 111,13,5811 II I,IV M,E 03050208 ASHEPO0 RIVER COLLETON 111,14,43{1 1 U U tl I I I III'I E 03050208 BATTERY CREEK BEAUFORT 141,43,6311 II III E DUMP RUNOFF 03050208 BEAUFORT RIVER BEAUFORT N D*002 111,13,4311 N I{IISI I I I I I,IV M,E 03050208 BEAUFORT RIVER BEAUFORT MDn-001 111,41,4311 N II I,IV M,E 03050208 BEAUFORT RIVER BEAUFORT MDn-004 111,13,4311 N { I I,IV M,E IALSO PT SOURCE 03050208 BROAD CREEK BEAUFORT I 41,43 {1 U II III E 03050208 BROAD RIVER BEAUFORT 111,13,901 I II IV,VII E U3050208 CALIBOGUE SOUND & TRIBS BEAUFORT 113,21,4311 U U U U I{II I I I III E 03050208 COLLETON RIVER B EAUFORT 1 1,13 {1 O II Ill,IV E 03050208 COOSAWHATCHIE RIVER JASPER ICSTL-107 1 1,58 11I S II I,IV M,E 03050208 COOSAWHATCHIE RIVER HAMPTON ICSTL-109 11 II S S N 11 ISI I,IV M,E 03050208 IRELAND CREEK COLLETON ICSTL-044 11 II S S II I,III M,E DO,pH 03050208 JENKINS CREEK BEAUFORT 61 11I II III E IAT HENRYS FARM 03050208 LK WARREN ON BLACK CK HAMPTON 1 1,13 11I U II III EI 03050208 LUCY POINT CREEK BEAUFORT 13 {1 O { I III EI 03050208 NEW RIVER BEAUFORT MDn-118 111,13,4311 S II I,IV,V M ,EI 03050208 OKATIE RIVER BEAUFORT I 11,13 I1 U II II I EI 03050208 {OLD HOUSE CK-FRIPP INLET BEAUFORT I 65,90 I1 U II III E ISHELLFISH PROHB 03050208 I POCOTALIGO RIVER BEAUFORT MD8-007 111,13,5811 S S II I,IV,V M,E 03050208 IPORT ROYAL SOUND & TRIBS BEAUFORT 113,21,4311 U U U U II III E 03050208 ST HELENA SOUND BEAUFORT 111,13, 9011 {UI I I IV,VII E 03050208 TRERCHARDS INLET BEAUFORT I13 11I II III E 03050208 WRIGHT RIVER JASPER I 80 11I U II III E SPOIL RUNOFF 03060101 BROADWAY CREEK ANDERSON SV-136 111,14,1811 II I M 0306010 1 CONEROSS CREEK OCONEE 111,14,3211 U II Ill,IV E 03060101 LAKE HARTWELL OCONEE 111,32,43i1 1 U II Ill,IV E IALSO PT SOURCE 03060101 LAKE KEOWEE OCONEE SV8-312 I14 11I II I,IV M 03060101 LAKE KEOWEE OCONEE SV8-311 I 14,32 11I l{ I INI I,III,IV M,EI TABLE A (Continued) NONPOINT SOURCE ASSESSMENT lI I l NPS II II DATA I MONITORED/ I STDS. I ADDITIONAL WATERSHED I WATERBODY I COUNTY ISTATION tlCATEGORYII PARAMETERS OF CONCERN 11 SOURCE I EVALUATED I VIO. I COMMENTS I I l I IIFC I DO I TX I SS I NT I pH I TB I BO I AM II I I I 03060101 1 LITTLE RIVER I OCONEE I SV-203 111,21,3211 l U I I U I N I I I I II I,III,IV I H,E I I 03060101 1 SIX AND TWENTY CREEK I ANDERSON I SV-181 111,18,3211 N I I I I N I I S I I II I,IV I N,E I l 03060101 l THOMPSON RIVER I OCONEE l 111,32,4311 t I I U I I I U I I II III I E I l 03060101 1 TWELVE MILE CREEK I PICKENS I SV-282 l 11,14 11 N I I I IN I I S I I II I,IV I N I 03060101 l TWELVE MILE CREEK I PICKENS I SV-015 111,14 11 I I I I N I I S I l l IIII,IV I I,E I l 03060101 1 WHITEWATER RIVER I OCONEE I 14,43 II I I I U I I I U I I l IV I E I 03060102 1 BATTLE CREEK I OCONEE I 121,32 11 I I IU I I IU I I ll III I E I l 03060102 1 BEAVERDAM CREEK I OCONEE I 11,14 i I I I U I U I I I I II III I E I l 03060102 l BRASSTOWN CREEK I OCONEE I 121,32 11 I I I U I I I U I I l III I E I l 03060102 l CHATTOOGA RIVER I OCONEE I 111,13,2111 1 I I U I I I U I I I I,1V I E I 03060102 1 CHAUGA RIVER I OCONEE I 1 21,32 If I I I U I I I U I I II III I E I l 03060102 1 LAKE RUSSELL I ABBEVILLE 1 111,14,3211 l I I U I I I I I II III,IV I E I l 03060102 1 OPOSSUM CREEK I OCONEE I1 21,32 I I I I U I U I III I E I 03060102 1 SAWNEY CREEK IABBEVILLE ISV-052 1 14 11 S I I I I I I I I I M I i 03060103 1 CLARKS HILL RES IMcCORMICK I 114 11 I I U I U I II III I E I I 03060103 1 LAKE SECCESSION I ABBEVILLE I SV-121 111,14,3211 1 I S I I S I S I I I S II I,1I,IV I H,E I J 03060103 1 LAKE SECCESSION I ABBEVILLE I SV-122 1 11,14 11 I I I I I S I I I S II I,IV I M,E I l 03060103 1 LEGION LAKE IABBEVILLE I 11,43 11 I I I U l I I I I 11 III I E I 03060103 1 LITTLE RIVER I McCORMICK I l 14 11 I U I I U I I II III I E I l 03060103 i LONG CANE CREEK I McCORMICK I SV-318 111,14,3111 l I S I I N I I S I I N 11 1,111 I N,E I l 03060103 l LOWER THREE RUNS CREEK I ALLENDALE I SV-175 111,13,1411 1 I I I N I I I I S II I I M I 03060103 1 SUDLOW LAKE I AIKEN I 1 32,58 11 I I IU I I I U I I I 11,1V I E I 03UbU106 I BRIDGE CREEK I AIKEN I SV-070 111,14,5811 I S I I S IS I I IN II I,IV I N,E I I U0300106 I HORSE CREEK I AIKEN I SV-072 I 41,43 11 I I I I N S I I I S I I I N 03060106 1 HORSE CREEK I AIKEN I SV-071 I 41,43 11 I IS I I S I S I I N II I I M I l 03060106 1 HORSE CREEK I AIKEN I SV-250 141,43,5811 I S I I S IS I I IN II I,IV I N,E I 03060106 1 HORSE CREEK POND I AIKEN ISV-096 141,43 11 I I I I N I I I IS II I I M I l 03060106 1 LITTLE HORSE CREEK I AIKEN I SV-317 111,58 11 I I I IN IS I I I II I,IV I M,E I l 03060106 1 LITTLE HORSE CREEK I AIKEN I SV-073 I 11 lI I I I N I S I I IS I,II I M,E I l 03060106 1 SAND RIVER I AIKEN ISV-069 141,43 ilS I I I IS IS I I IN II I I M I 03060106 1 STEVENS CREEK I McCORMICK I 14,58 11 I I I U I I I U I I II III,IV I E I l 03060106 ! TURKEY CREEK I McCORMICK I l 14 il I I IU l l U I I ll III I E I 03060107 1 CUFFEYTOWN CREEK I McCORMICK I 14,58 11 I I I U I I I U I I II III,IV I E I l 03060107 1 HARD LABOR CREEK I McCORMICK I l 13,14 11 I I I U I I I U I i II III I E I 03060107 1 SAVANNAH RIVER I JASPER I 141,43,8011 I I U I I I I I I II III I E I I SPOIL RUNOFF data, 29 percent were based on evaluated data, and 36 percent were a combination of monitored and evaluated. After analyzing all the data, it became evident that the greatest NPS pollution contributors are agricultural runoff and urban runoff, contributing 67 percent and 43 percent respectively to the identified waterbodies. Other NPS categories include construction (14%), abandoned gravel, sand, and clay mines (6%), silviculture (4%), on-site wastewater systems (4%), hazardous waste (.3%), channelization (2%), landfills (.6%), sludge (.3%), other (1% includes golf course and spoil runoff), and unknown (3%). The total percentage exceeds 100 because several of the identified waterbodies had more than one NPS category contributing to the problem. Nine percent of the waterbodies were also impacted by point source discharges. For these particular waterbodies, nonpoint sources appear to be the primary contributor; however, a point source discharge existed upstream and may contribute to the water quality values as well. Nine water quality parameters were utilized in the assessment for determining NPS problem areas. The various waterbodies may have had numerous, scattered, or undetermined exceedences of numeric criteria for the parameters concerned. Of the 336 waterbodies identified, NPS problems were indicated with fecal coliform in 46 percent, dissolved oxygen in 29 percent, toxic materials in 23 percent, suspended solids in 14 percent, nutrients in 53 percent, pH in 20 percent, turbidity in 37 percent, biological oxygen demand in 8 percent, and ammonia in 27 percent. Several of the NPS waterbodies had values that exceeded South Carolina numeric water quality standards of the waterbodies actual use classification 17 for three parameters.1 Four percent of the waterbodies had dissolved oxygen (DO) exceedences, 2 percent had pH exceedences, 4 percent had fecal coliform (FC) exceedences; 2 percent had both DO and pH exceedences, 1 percent had both DO and FC exceedences, .3 percent had exceedences of both pH and FC, and .6 percent had values which exceeded standards for all three parameters. 1 If 50 percent of the values for a given parameter exceeded the numeric criteria (see Appendix I), that waterbody was considered to contravene State water quality standards for that parameter. 18 CHAPTER 2 SURFACE WATER NPS METHODOLOGY Initial NPS Assessment As defined by the Association of State and Interstate Water Pollution Control Administrators and the Environmental Protection Agency's America's Clean Water, nonpoint sources are those sources of pollution that are not covered by a site-specific discharge permit. With this definition in mind, a methodology was developed to assess waterbodies in South Carolina that are impacted or potentially impacted by NPS. Data from the S. C. Department of Health and Environmental Control (DHEC) statewide ambient water quality monitoring network were used as primary data source for the Assessment and as a database upon which to build. The monitoring network provides the best representation of general water quality in South Carolina because it contains historical data, has wide coverage of parameters, and provides monthly sampling data. This is the only data source designated as "monitored" for the purpose of this Assessment; all the others are designated as "evaluated". An initial NPS database was acquired by retrieving data on selected parameters from the 545 active DHEC monitoring stations in the ambient monitoring network between 1983 and 1988. Exceedence of State Water Quality Standards,' EPA criteria, and staff professional judgement were used to identify contraventions. These waterbodies were analyzed in detail to determine which parameters had numerous contraventions and which had scattered 1 Class A standards were applied to all assessed waterbodies in order to indicate NPS impacts. 19 contraventions. Water quality parameters used as indicators of NPS pollution were: fecal coliform bacteria, dissolved oxygen, toxic materials such as heavy metals and pesticides, suspended solids or sediment, nutrients (phosphorus and/or nitrogen), pH, turbidity, biological oxygen demand, and ammonia. Appendix I lists the indicator parameters, the standard or criterion employed to determine contraventions or exceedences, and the source of that standard or criterion. The State has adopted numeric water quality standards for three of the parameters listed in the assessment: dissolved oxygen, fecal coliform bacteria, and pH. Waterbodies where levels exceeded one or more of the standards for that particular waterbody's classification were determined, and parameters exceeding these levels are denoted in column nine of Table A. After identifying monitoring stations where the aforementioned water quality parameters contravened applied criteria, additional factors were examined to determine if the levels resulted from NPS pollution. Consideration was given to which parameters were contravened and to the distance of the stations from point source wastewater treatment discharges. If discharges were far enough upstream so as to be out of an area of impact, further consideration was given to land use and geographical characteristics of the area to determine if an NPS category, such as agriculture or urban development, or a combination of categories could be the contributor to observed water quality problems. Additional information was gathered through a survey of various groups, agencies, and individuals. Survey forms were sent to individuals throughout the State who are knowledgeable in water quality matters, including S. C. Department of Health and Environmental Control district engineers, Soil and Water Conservation District commissioners, members of environmental groups, water-recreation groups, local conservationists, wildlife officers, and other 20 interested public. Appendix II contains a copy of the survey form sent to each of these various groups, agencies, and individuals. The surveys were used to solicit information about specific waterbodies with existing or potential impacts from nonpoint sources, effects on waterbodies, NPS categories, and existing and potential uses of the waterbodies. The data accrued from the surveys were compared to the monitored data. If the impacted waterbody reported by the survey had already been identified from the monitored data, it was also identified as "evaluated" in the Assessment list and additional NPS categories were added as appropriate. NPS impacted waterbodies not already identified from the monitored data were added as new entries to the list and were identified only as "evaluated" in the list. Waterbodies identified as NPS impaired in the South Carolina Water Oualitv Assessment 1986-1987 [305(b) Report]; America's Clean Water. the State's NonDoint Source Assessment 1985. AoDendix produced by ASIWPCA; and the National Estuarine Inventory-National Coastal Pollution Discharoe Inventory by the National Oceanic and Atmospheric Administration were compared to those already listed and added where necessary along with the corresponding data source designation. S. C. Land Resources Conservation Commission (LRCC) identified high potential NPS problem areas in the agricultural, construction, and abandoned mine categories utilizing a computerized sediment yield model. LRCC used a geographic information system (GIS) and a sediment yield model called SEDCAD in this assessment. Statewide estimates of sediment yield were derived by combining four spatial data sets (i.e., watershed boundaries, land use/land cover, soil, and hydrology) to develop inputs required by the sediment yield model. As a result of the analysis, hydrologic units were separated by watershed into six Major Land Resource Areas (MLRA) and, upon completion of the analysis phase, were further subdivided into four distinct "potential" 21 sediment yield categories: (1) less than the weighted average, (2) greater than the weighted average, (3) more than twice the weighted average, and (4) more than three times the weighted average. Appendix IV contains a detailed discussion of the modelling methodology and results. The smallest detailed unit of area usable in the simulation modelling is that of watershed units (subdivisions of the Federal Hydrologic Unit Code areas). Each waterbody within each watershed unit of concern was located on a reference map. Those areas identified as having high potential for agricultural, construction, or abandoned mine1I runoff were compared to the list of NPS problem waterbodies. Where there was a match, category and data source were added to the Assessment list. Future NPS Assessment As described in the Nonpoint Source Management Plan, an important goal of the NPS Program over the next four years will be to implement comprehensive monitoring and assessment procedures to further evaluate specific impacts of NPS pollution and the effectiveness of BMPs in improving degraded water/biological quality, or preventing NPS impacts. It is projected that the NPS monitoring methodology will be finalized and implemented in several watersheds during the 1989 program period. Monitoring and assessment will be completed in targeted watersheds carefully selected by the State's Nonpoint Source Task Force. Waterbodies/watersheds targeted for implementation may include streams, rivers, lakes, estuaries, coastal waters, wetlands, or groundwaters. Located throughout South Carolina, these ecosystems are naturally diverse with respect to physiography, hydrology, biological community and habitat structure, and chemical/physical water quality characteristics. The diversity of nonpoint 1 Active mine runoff is controlled through NPDES permits. 22 source categories, impacts, and pollutants indicate that flexible site-specific procedures are critical for NPS monitoring and assessment. It is expected that the following data sources, assessment procedures, and monitoring approaches will be considered in the development of a methodology for NPS studies in targeted watersheds: HISTORICAL TREND DATA Ambient Water Quality Monitoring Data Physical Parameters Chemical Parameters (includes metals/pesticides) Microbiological Parameters Ambient Sediment Monitoring Data Chemical Parameters Metal s/Pesticides Ambient Biological Monitoring Data Fixed Station Monitoring Macroi nvertebrates Finfish Crustaceans Shellfish Toxic Materials Monitoring Ambient Shellfish Monitoring Data Physical Parameters Bacteri ol ogi cal Parameters Ambient Groundwater Monitoring Data Physical Parameters Chemi cal Parameters 23 ASSESSMENT/MONITORING PROCEDURES Biomonitoring (biointegrity) Studies Using Fish, Macroinvertebrates, Algae, or Habitat Evaluation Before versus After (time trend) Design Above and Below Design Paired Watershed Design Ecoregion Assessment Process Toxicity Testing Studies Water Quality Based Synoptic Studies Using Physical/Chemical Data to Evaluation NPS Pollutant Load and Reductions Following BMP Implementation Before versus After Design Above and Below Design Paired Watershed Design Predictive NPS Modelling Procedures GIS Mapping Mathematical Modelling of Potential Sediment Yield or Other NPS Related Pollutants - SEDCAD Model 24 CHAPTER 3 GROUNDWATER ASSESSMENT The following nonpoint source groundwater pollution assessment is provided in accordance with the Clean Water Act.Amendments of 1987, is parallel with the S.C. Groundwater Protection Strategy, and is intended to provide an assessment of nonpoint source (NPS) groundwater rated pollution problems (as defined by U. S. Environmental Protection Agency [USEPA]). All aquifers in South Carolina meet the requirement for classification as underground sources of drinking water (USDW) in that they provide water containing less than 10,000 mg/l total dissolved solids. All aquifers are subject to Class GB (drinking water) standards (Regulation 61-68) and are to be protected, as such, from adverse alteration. Administratively, facility permitting and groundwater protection program areas of the S. C. Department of Health and Environmental Control have been structured to provide groundwater quality protection from contamination by nonpoint sources. Separate Bureaus within the Agency have been designated specific responsibilities regarding the major regulated groundwater related NPS pollution categories. These three Bureaus and their general responsibilities regarding nonpoint sources (as identified by USEPA) are as follow: 1. Bureau of Water Pollution Control Responsible for permitting and enforcement of: a. sludge disposal by land application, b. wastewater land treatment (domestic and industrial), and C. other individual waste treatment and disposal systems (large absorption fields, etc.) 25 2. Bureau of Drinkina Water Protection Responsible subcategories (permitting and enforcement): a. underground storage tanks, b. injection control, C. well head protection program, and d. formation of strategy and policy regarding aquifer designations. 3. Bureau of Solid and Hazardous Waste Responsible for permitting and enforcement of: a. landfills, and b. hazardous waste facilities. Previous Departmental and cooperative studies and assessments of groundwater pollution sources and aquifer characteristics have provided substantial insight into identification of major groundwater contamination sources, designation of aquifer relationships, and recognition of geographic regions in need of priority protection. For the most part, these studies were funded by federal grants which contributed vastly to current knowledge and understanding of the complex hydrological system of South Carolina, Some of the more significant studies and assessments are as follow: 1. Economic and Environmental ImDact of Land Disnosal of Wastes in the Shallow Aauifer of the Lower Coastal Plain of South Carolina (SCDHEC, June 1980, 9 volume report). This in-depth study of waste disposal practices involved comprehensive evaluation of ambient groundwater quality of the shallow aquifer and prioritization of generally accepted waste treatment/disposal practices involving land application. Evaluated disposal practices ranged from large industrial tile fields to landfilling of solid wastes. Generally, the study concluded that industrial tile fields, leaky holding ponds, and poorly sited landfills contributed a significant impact to the shallow coastal aquifers. 26 2. South Carolina Surface ImDoundment Assessment (SCDHEC, 1980). General conclusions of this study indicated leaky lagoons comprised a significant potential for aquifer degradation, particularly in areas of permeable soil and high water table situation. 3. Surface and Subsurface Statioraohv. Structure. and Aouifers of the South Carolina Coastal Plain (SCDHEC, 1983). This study provided a comprehensive overview of aquifer characteristics and relationships in the South Carolina Coastal Plain (i.e., potential recharge areas and aquifer interconnection). 4. Desionation of Aouifer Systems in the Piedmont Province of South Carolina (SCDHEC, 1987 draft report to EPA). Provided a general overview of major considerations and mechanisms of both the shallow saprolite and underlying fractured bedrock aquifers within the Piedmont Province. 5. Groundwater Nonooint Source Water Oualitv Manaaement Plan (SCDHEC, November 1978) This publication was developed by the State 208 Nonpoint Source Management Task Force consisting of DHEC and other governmental agencies. The purpose of this report was to identify and prioritize nonpoint source problem areas and activities; however, due to lack (at the time) of an adequate monitoring database, the assessments were incomplete. However, a strategy was developed utilizing technology of the time to form best management practices (BMPs) for controlling or abating nonpoint source pollution. These practices were developed with cooperative involvement of State and local governments and extensive public interaction including the public hearing process and are generally accepted throughout the State. The most recent South Carolina Groundwater Contamination Inventory compiled by the Groundwater Protection Division of DHEC contain approximately 390 incidents of groundwater contamination at 350 sources. NPS categories account 27 for 200 incidents including leachate from landfills, leachate from spray irrigation sites, leachate from individual sewage treatment and disposal systems, leaks from tanks or lagoons, and spills. This information is exhibited in Table B. Information for the inventory is based on self-monitoring data from the facility or special investigation. Of 200 sites on the list, approximately 28 percent involve leaking underground storage tanks and leakage or leachate from pits, ponds, and lagoons used for wastewater disposal or storage. Major spills and slow leaks not associated with in-place petroleum tanks comprised 28 percent; landfills (both industrial and municipal) 17 percent; leachate from spray irrigation of wastewater (both industrial and municipal) 13 percent, and leachate from individual sewage treatment and disposal system tile fields 10 percent. The total of percentages exceeds 100 percent because a particular site may have been impacted by more-than one category. Lagoons (including industrial pits and ponds), landfills (industrial and municipal), and underground storage tanks which have documented association with groundwater contamination are not restricted to any particular areas of the State, but are more concentrated in the three major urban/industrial centers: Greenville/Spartanburg, Columbia, and Charleston. An additional concentration of groundwater contamination problems has been associated with high water table recharge areas in Beaufort County. Corrective action by the appropriate Bureau of the Department has been taken for all of the incidents listed, and most of the problems have been remediated at the site. An unknown factor, however, is the impact of groundwater contamination from inventoried sources on surface water. In many cases, groundwater recharges surface streams and lakes. Therefore, a need exists to carry out investigations in an attempt to link contaminated groundwater to consequently NPS impacted surface water. 28 TABLE B GROUNDWATER NPS ASSESSMENT SITE COUNTY PARAMETERS OF CONCERN NPS CATEGORY Whitlock Wool Combing ALLENDALE NO3 62 Sandoz Colors and Chemicals ALLENDALE N03,METALS,VOC,OTHER 62 Palmetto Dunes Plantation BEAUFORT N03 62 Plusa Inc. BERKELEY N03 62 Carolina Eastman CALHOUN N03 62 Wando River Terminal CHARLESTON N03 62 E.I. Dupont de Nemour FLORENCE N03 62 Wolverine Brass HORRY VOC 62 Kendall Company KERSHAW N03 62 Swansea Municipal Sewage Treatment LEXINGTON METALS 62 Carolina Gravure LEXINGTON METALS 62 Masonite MARION N03 62 Delta Mills Plant MARLBORO N03 62 Ashland Chemical Company RICHLAND OTHER 62 National Starch and Chemical SPARTANBURG N03 62 Hoechst Fibers SPARTANBURG METALS,VOC 62 Lyman, Town of SPARTANBURG N03 62 Campbell Soup SUMTER N03 62 Sonoco DARLINGTON OTHER 62,63,82 Sea Pines Plantation BEAUFORT N03 62,65,82 Abco SPARTANBURG VOC, METALS 62,82 International Wire Products SPARTANBURG METALS,VOC 62,82,84 Lindau Chemical Company RICHLAND VOC 62,84 Savannah River Plant LF DWP-087A AIKEN VOC 63 Savannah River Plant - Silverton Rd AIKEN VOC 63 Horse Creek Poll. Cntrl. IWP-161 AIKEN METALS 63 Savannah River Plant - CMP Pits AIKEN METALS,VOC,P/H 63 Singer Company ANDERSON VOC 63 Owens-Corning LF IWP-015 ANDERSON VOC 63 Barnwell County LF DWP-001 BARNWELL VOC 63 Beaufort County LF DWP-063 BEAUFORT METALS,N03 63 Charleston County LF DWP-061, -079 CHARLESTON METALS 63 TABLE B (Continued) GROUNDWATER NPS ASSESSMENT SITE COUNTY PARAMETERS OF CONCERN NPS CATEGORY Landfill, Inc. CHESTER VOC, METALS 63 Chesterfield County LF DWP-036 CHESTERFIELD METALS 63 Chesterfield County LF DWP-017 CHESTERFIELD METALS 63 Colleton County LF DWP-076 COLLETON METALS 63 Darlington County LF DWP-060 DARLINGTON METALS,VOC 63 Edgefield County LF DWP-040 EDGEFIELD N03 63 Florence County LF DWP-021 FLORENCE METALS,VOC 63 Koppers Co., Inc. FLORENCE BNA 63 Andrews Wire GEORGETOWN METALS 63 Georgetown Steel GEORGETOWN METALS,N03 63 Piedmont LF I & II DWP-009 GREENVILLE VOC 63 Simpsonville LF GREENVILLE VOC 63 City of Greenville LF DWP-070 GREENVILLE VOC 63 Western Carolina Reg. Sewer IWP-152 GREENVILLE METALS,N03 63 Greenwood Co. LF DWP-100 GREENWOOD VOC 63 Monsanto GREENWOOD VOC 63 Helena Chemical HAMPTON P/H 63 Kershaw County LF DWP 008 & 008A KERSHAW METALS 63 Torrington Co. LAURENS VOC 63 Cryovac Dumpaite LAURENS METALS,CHLOROFORM 63 Lexington County Landfill DWP-030 LEXINGTON VOC 63 Carolina Chemicals LEXINGTON P/H 63 Farmers Mutual Exchange LF MARLBORO METALS,VOC 63 J.P. Stevens IWP-104 OCONEE N03 63 Sangamo Weston PICKENS PCB 63 Platt Saco Lowell PICKENS METALS 63 Chambers/Richland Co. LF DWP-126 RICHLAND VOC 63 Batchelder-Blasius SPARTANBURG METALS 63 Sumter County LF-Cook St. SUMTER METALS 63 Shaw AFB SUMTER VOC 63 Gist Brocade Fermentation WILLIAMSBURG N03 63,82 Celanese Fibers Operations YORK VOC 63,82 TABLE B (Continued) GROUNDWATER NPS ASSESSMENT SITE COUNTY PARAMETERS OF CONCERN NPS CATEGORY Venture Chemical BEAUFORT PCB,METALS,VOC 63,82,84 Ethyl Corporation ORANGEBURG VOC 63,84 McEntire ANG Base RICHLAND VOC 63,84 Groce Laboratories SPARTANBURG VOC 63,84 Puretown Restaurant & Truck Stop ANDERSON N03 65 Folly Island CHARLESTON N03 65 Hutchinson Trailer Park FLORENCE NO3 65 Columbia Organic Chemical KERSHAW VOC,METALS 65 Inland Container Company LEXINGTON METALS 65 F.B. Johnston, Inc. LEXINGTON VOC 65 Wood Brothers Inc. LEXINGTON OTHER 65 Becton Dickinson and Co. OCONEE METALS 65 Greenwood Mills Liner Plant ORANGEBURG VOC,N03,PHENOL 65 Fairfield Chemical Company RICHLAND VOC 65 Kings Laboratories RICHLAND VOC 65 Future Fuels RICHLAND VOC 65 Robbins and Myers, Inc. RICHLAND N03 65 Derrick private well RICHLAND PETROPROD 65 Spartan Plating and Grinding SPARTANBURG METALS 65 Cherryvale Subdivision SUMTER PETROPROD 65 Booth Farms SUMTER N03 65 Palmetto Pigeon Plant SUMTER N03 65 Kalama Specialty Chemicals BEAUFORT VOC 65,82 Greenwood Mills Edisto Plant ORANGEBURG N03,PHENOL 65,82 Savannah River Plant M-Area AIKEN VOC 82 Savannah River Plant-Old TNX Basins AIKEN METALS 82 Savannah River Plant L-Area AIKEN N03 82 Savannah River Plant F-Area AIKEN RAD 82 Savannah River Plant tz-Area AIKEN RAD 82 Eliskim, Inc. ANDERSON METALS 82 Wamchem BEAUFORT METALS,VOC,N03 82 Independent Nail BEAUFORT METALS 82 TABLE B (Continued) GROUNDWATER NPS ASSESSMENT SITE COUNTY PARAMETERS OF CONCERN NPS CATEGORY Parker White Metals Co. BEAUFORT METALS 82 Mobay Chemical Corp BERKELEY VOC 82 Moore Drums CHARLESTON METALS,VOC 82 Geiger Property CHARLESTON VOC 82 General Electric CHARLESTON VOC 82 Cummins Engine CHARLESTON METALS 82 Lockheed-Georgia Company, Inc. CHARLESTON METALS,VOC 82 Mobil Chemical Company CHARLESTON N03,P/H 82 Stoller-Mii CHARLESTON METALS,N03 82 Virginia Chemicals CHESTER VOC,SALTS 82 Ti-Caro-Knit CHESTERFIELD 82 Balchem Corp COLLETON METALS,VOC 82 Asten Hill Manufacturing Co. COLLETON VOC 82 Celanese Fibers DARLINGTON VOC 82 Sweetwater community EDGEFIELD PETROPROD 82 L-Tec FLORENCE VOC 82 Kaiser Aluminum Company FLORENCE P/H 82 General Electric Co. FLORENCE VOC, METALS 82 Floyd's Grocery GEORGETOWN PETROPROD 82 American Cyanimid GEORGETOWN Al SULFATE 82 General Battery Corporation GREENVILLE METALS 82 T & S Brass and Bronze Works, Inc. GREENVILLE VOC,METALS 82 Steel Heddle Manufacturing GREENVILLE METALS,VOC 82 Roy Metal Finishing Works, Inc. GREENVILLE METALS,VOC 82 Carolina Plating Works GREENVILLE METALS, VOC 82 American Hoechst Corp GREENVILLE METALS,VOC 82 Westinghouse HAMPTON PHENOLS 82 Reichold Chemical Company HAMPTON METALS,VOC 82 Pine Valley Estates HORRY N03 82 Garden City Shopping Center HORRY MBAS,TDS 82 Hardwicke Chemical KERSHAW METALS,VOC 82 E.I. Dupont KERSHAW METALS 82 TABLE B (Continued) GROUNDWATER NPS ASSESSMENT SITE COUNTY PARAMETERS OF CONCERN NPS CATEGORY Southern Screening & Engraving LANCASTER VOC, METALS 82 Lehigh-Lancaster Inc. LANCASTER METALS 82 Simpson private well LAURENS PETROPROD 82 Union Switch & Signal LEXINGTON METALS,VOC 82 Allied Fibers and Plastic Corp. LEXINGTON METALS, VOC, N03 82 Springdale private well LEXINGTON PETROPROD 82 Roper Industries ORANGEBURG 82 Shuron, Inc. ORANGEBURG VOC 82 Chevron/Gulf Terminal RICHLAND PETROPROD 82 Bendix/Amphenol Products RICHLAND VOC 82 Amphenol Products RICHLAND VOC 82 Townsend Textron Sawchain RICHLAND METALS,N03 82 Inman Quarry SPARTANBURG VOC,METALS 82 Siemens Allis/ITE SPARTANBURG METALS,VOC 82 Blackman-Uhler Chemical SPARTANBURG VOC 82 International Mineral Corp. SPARTANBURG N03 82 Milliken Chemical Company SPARTANBURG VOC 82 Thermal Oxidation Corp. SPARTANBURG VOC 82 Sybron Chemicals Inc. SPARTANBURG 82 Southern Wood Piedmont SPARTANBURG BNA 82 Southern Coatings SUMTER METALS 82 CP Chemicals Inc. SUMTER METALS,VOC 82 Valchem AIKEN VOC 82,84 Perfection Hytest DARLINGTON VOC 82,84 Wellman, Inc. FLORENCE PETROPROD,VOC 82,84 L & M Self Service FLORENCE PETROPROD 82,84 Vicellon GREENVILLE VOC 82,84 Crown Metro, Inc. GREENVILLE VOC 82,84 Para-Chem, Inc. GREENVILLE VOC,METALS 82,84 Seaboard System Railroad AIKEN VOC 84 Defense Fuel Support Point BERKELEY PETROPROD 84 Chevron Gulf Terminal CHARLESTON PETROPROD 84 TABLE B (Continued) GROUNDWATER NPS ASSESSMENT SITE COUNTY PARAMETERS OF CONCERN NPS CATEGORY Swygert's Shipyard CHARLESTON PETROPROD 84 Texaco Terminal CHARLESTON PETROPROD 84 Broad River Brick CHEROKEE PETROPROD 84 Carolawn Industries CHESTER VOC 84 Scurry Private well EDGEFIELD PETROPROD 84 Winnsboro Petroleum Company FAIRFIELD PETROPROD 84 VC Summer Nuclear Station FAIRFIELD PETROPROD 84 Korn Industries FLORENCE PETROPOD 84 Ethox GREENVILLE PETROPROD 84 Cone Mills Union Bleachery GREENVILLE METALS 84 Colonial Pipeline Spill Site 2 GREENVILLE PETROPROD 84 Colonial Pipeline Spill Site 1 GREENVILLE PETROPROD 84 General Electric Gas Turbine GREENVILLE PETROPROD 84 Carolina Plating and Stamping GREENVILLE METALS 84 Roll Technology GREENVILLE METALS 84 Myrtle Beach AFB HORRY PETROPROD 84 Suffolk Chemical Co. LEXINGTON VOC 84 Columbia Metropolitan Airport LEXINGTON PETROPROD 84 SC Recycling & Disposal-Dixiana LEXINGTON METALS,VOC 84 Palmetto Wood Preserving, Inc. LEXINGTON METALS 84 S.C. Fire Academy LEXINGTON VOC 84 Georgia Pacific Corp. ORANGEBURG PETROPROD 84 Palmetto Recycling RICHLAND METALS 84 SC Recycling Disposal-Bluff Rd. RICHLAND VOC 84 Cardinal Chemical Company RICHLAND VOC 84 Westinghouse Nuclear Fuel Div. RICHLAND N03, Fluoride 84 Bell South RICHLAND PETROPROD 84 Plantation, Inc. SPARTANBURG PETROPROD 84 Union Oil Co. SPARTANBURG PETROPROD 84 British Petroleum SPARTANBURG PETROPROD 84 Amerada Hess SPARTANBURG PETROPROD 84 Crown Central Petroleum SPARTANBURG PETROPROD 84 TABLE B (Continued) GROUNDWATER NPS ASSESSMENT SITE COUNTY PARAMETERS OF CONCERN NPS CATEGORY Frank Elmore Site SPARTANBURG VOC 84 Ashland Oil Co. SPARTANBURG PETROPROD 84 Shell Oil Co. SPARTANBURG PETROPROD 84 Chevron, Inc. SPARTANBURG PETROPROD 84 Exxon Company, USA SPARTANBURG PETROPROD 84 Exide Battery SUMTER METALS 84 Carolina Drums YORK VOC 84 Leonard Chemical Co. YORK VOC,METALS 84 CONTAMINANTS ABBREVIATION Total Dissolved Solids TDS 62 - Land Disposal - Wastewater Surfactants MBAS Petroleum Products PETRO 63 - Land Disposal - Landfills Volatile Organics VOC Metals METALS 65 - Land Disposal - Septic Tanks Nitrates N03 Pesticides/Herbicides P/H 82 - Waste Storage/Storage Tank Leaks PCB PCB Base, Neutral & Acid Ex. BNA 84 - Spills Phenols PHENOL Redionuclides RAD Other OTHER CHAPTER 4 DATA GAPS The Surface Water NPS Assessment relied heavily on water quality data gathered from DHEC's ambient monitoring network. I Since NPS runoff normally occurs during a storm event, trend monitoring does not lend itself to detecting NPS pollution as well as specially timed intensive monitoring surveys or knowledge of location of NPS occurrences. Resources did not allow correlation of trend water quality data with antecedent rainfall data, but this type of analysis will be carried out over the four-year program period as part of the evaluation of watersheds/waterbodies targeted for further study and impl ementati on assessment. Problem areas reported to us by the interested public comprise 7 percent of those areas listed in the survey. This source of data should necessarily be thought of as subjective until verified by water quality analysis. It is valuable information for the assessment, though, because of the inherent problems with trend monitoring mentioned above and because monitoring stations cannot provide 100% coverage geographically. It was planned to place special emphasis on state coastal waters by examining data (primarily bacterial) from DHEC's network of approximately 371 shellfish fixed monitoring stations and results of sanitary surveys conducted by district personnel. However, this data analysis requires large amounts of staff time and, due to unforeseen delays, staff has not yet completed this task. This evaluation will be completed during the 1989 program period, and additional NPS problem areas determined from this data will appear in the first year progress I The network of 189 primary stations are sampled once per month year round; 356 secondary stations are sampled once per month during the six summer months (May-October) 36 report. The State NPS Task Force can consider adding these waterbodies to the lists targeted for implementation or further evaluation. Due to time and resource constraints, the surface water NPS assessment presented in this report was unable to utilize DHEC data from the 51 fixed biological monitoring stations or special biological monitoring studies. These 51 stations are currently distributed as 26 EPA Basic Water Monitoring Program (BWMP) Stations, 9 Special Status -Stations, and 16 Estuarine Stations. Parameters sampled during trend monitoring and intensive surveys may include macroinvertebrates, finfish, shellfish, and crustaceans depending on site characteristics and study objectives. Generally, the biological monitoring network will allow for the detection and evaluation of changes in the biological stability of community structure and the presence and/or build-up of potentially hazardous substances in aquatic organisms. While some of these stations have been sited to evaluate point source impacts, many were chosen according to these additional criteria: a. At locations in selected major waterbodies potentially subject to inputs of contaminants from areas of concentrated urban, industrial, and/or agricultural use. b. At locations in selected waterbodies which are of critical value for sensitive uses such as domestic water supply, recreation, propagation, and maintenance of fish and wildlife. C. At locations in selected areas suited to deliver natural background water quality characteristics on a long-term basis. d. At locations in selected areas where specific water quality impairment has been documented with ameliorative procedures in place to follow the response of the water system to those procedures. As such, biological data from these stations can be used to evaluate the 37 long-term impacts of nonpoint sources and to provide biological community structure and stability information on these specific waterbodies. Additionally, the Water Quality Assessment and Enforcement Division (DHEC) has completed numerous special and intensive studies within streams, lakes, and estuaries throughout the State. Once integrated into an appropriate procedure, State biomonitoring data mentioned above will be extremely useful in establishing a baseline of naturally occurring biotic assemblages throughout geographic regions of the State. This information will be invaluable within a methodology aimed at assessing NPS impacts and effectiveness of BMP implementation. As stated within Section III of the NPS Management Program entitled "Targeting and Monitoring Waterbodies/Watersheds", a flexible site-specific methodology emphasizing biomonitoring and water quality based approaches will be used over the next four years of the NPS Program. Available biological monitoring data, such as the DHEC data described above, and information from other agencies including S. C. Wildlife and Marine Resources Department and U. S. Forest Service will be a significant input into development and implementation of a NPS monitoring and assessment methodology. It is evident from previous hydrogeological studies and the contamination inventory that significant nonpoint groundwater pollution sources exist within South Carolina, and significant geological data exists to generally identify geographic areas of particular protection need. It is also evident the overall NPS management plan regarding groundwater should address: 1. Updating and formalizing of land disposal BMPs; 2. A management plan to collect, store, and evaluate groundwater monitoring information; 38 3. Prioritization of nonpoint sources of groundwater impact by geographical/geological location; and 4. Optimization, coordination, and cooperation among the U. S. Geological Survey, S. C. Water Resources Commission, S. C. Land Resources Conservation Commission, USDA Soil Conservation Service, and other State and federal agencies. 39 CHAPTER 5 IDENTIFICATION OF HIGH QUALITY WATERS Some high quality waters in the State are threatened by potential degradation from nonpoint sources due to proposed or actual changes in cultural activities. An inventory of such waters was developed using two criteria. The South Carolina Water Classifications and Standards Regulation (61-68) defines high quality waters as those "surface waters where quality exceeds levels necessary to support propagation of fish, shellfish, and wildlife; and recreation in and on the water .. ." A list of such waterbodies was extracted from the 1986-87 Statewide Water Ouality Assessment 305(b) Report and matched with watersheds that have a high potential for NPS runoff as defined by the S. C. Land Resources Conservation Commission model employed for this Assessment. This methodology produced a list of 36 waterbodies/watersheds that are shown in Table C. They are spread over the entire state and include mountain streams, large midstate rivers, blackwater creeks, coastal creeks and rivers, and impoundments. The State Nonpoint Source Task Force will consider these waterbodies for specific measures to prevent NPS pollution when prioritizing and targeting waterbodies for implementation programs within the NPS Management Program. Additionally, preventive programs of a more general nature will be recommended and implemented through the Management Program. 40 TABLE C HIGH QUALITY WATERS Waterbodv Name Watershed(s) Countv(s) Black River 03040205-140 Williamsburg High Hill Creek 03040201-110 Darlington Little Pee Dee River 03040204-30,60 Dillon, Marion Pee Dee River 03040201-29,160 Marion, Marlboro Sparrow Swamp 03040202-100 Florence Swift Creek 03040201-110 Darlington Allison Creek 03050101-100 York Middle Saluda River 03050109-20 Greenville North Saluda River 03050109-10 Greenville North Tyger River 03050107-20 Spartanburg Princess Creek 03050109-40 Greenville Rabon Creek 03050109-130 Laurens Saluda River 03050109-40,80,150 Greenville, Greenwood, Laurens, Pickens Un. Trib. to Crawford Ck. 03050105-142 York Black Creek 03050208-60 Hampton Combahee River 03050208-10 Hampton Coosawhatchie River 03050208-50 Allendale, Hampton Shaw Creek 03050204-20 Aiken South Fork Edisto River 03050204-10,30 Aiken Turkey Creek 03050207-20 Barnwell Big Generostee Creek 03060103-30 Anderson Chattooga River 03060102-30,60 Oconee Cherokee Creek 03060103-70 Anderson Coneross Creek 03060101-80 Oconee East Fork Chattooga River 03060102-30 Oconee Little River 03060101-30 Pickens Rocky River 03060103-70 Anderson Savannah River 03060106-60 Aiken Lake Robinson 03040201-100 Chesterfield Prestwood Lake 03040201-110 Darlington Lake Greenwood 03050109-80 Greenwood Lake Lanier 03050105-155 Greenville North Saluda Reservoir 03050109-10 Greenville Table Rock Reservoir 03050109-20 Greenville Bridge Creek Pond 03050204-10 Aiken Lake Hartwell 03060101-40, Anderson 03060102-130, Anderson, Oconee 03060103-20 Anderson Lake Keowee 03060101-50 Oconee Lake Richard B. Russell 03060103-30 Anderson Lake Secession 03060103-70 Abbeville Leadenwah Creek 03050202-70 Charleston Kiawah River 03050202-70 Charleston Beaufort River 03050208-100 Beaufort 41 TABLE C (Continued) Waterbodv Name Watershed County(s) Chechessee River 03050208-90 Beaufort Colleton River 03050208-90 Beaufort Combahee River 03050208-10 Beaufort Broad River 03050208-90 Beaufort Dawhoo River 03050202-70 Charleston North Edisto River 03050202-70 Charleston, Colleton Port Royal Sound 03050208-90,100 Beaufort Trenchards Inlet 03050208-100 Beaufort Whale Branch 03050208-100 Beaufort (See Figure 1 for the location of these watersheds.) 42 CHAPTER 6 SPECIAL CONCERNS A. Antidegradation South Carolina Water Classifications and Standards contains rules concerning protecting uses and quality of the State's waters. One of the rules states the Department will not allow degradation of the quality of the State's waters unless "after intergovernmental coordination and public participation, that allowing lower water quality is necessary to important economic or social development in the areas where the waters are located. In allowing such lower water quality, water quality adequate to fully protect existing uses shall be maintained. The highest statutory and regulatory requirements for all new and existing point sources shall be achieved and all cost-effective and reasonable best management Dractices for nonDoint source control shall be encouraged." (emphasis added). Proposed revisions to these rules add a phrase that strengthens this passage. If this revision is kept, the sentence will read ". . . all cost effective and reasonable best management practices for nonpoint source control shall be achieved within the State's statutory authority and otherwise encourages." While the proposed policy meets EPA's criteria for antidegradation statements including NPS, it does not contain specific procedures for implementation. During the coming year, the Department will develop and adopt an antidegradation implementation procedure which will describe how the State addresses the issue of allowable degradation. The procedure will describe what type of waters are considered for allowable degradation and 43 the methodology to be used to determine to what extent degradation will be permitted. The procedures will address nonpoint sources of pollution consistent with the proposed wording cited above. B. Wetlands The Assessment addresses NPS impacted wetlands, both freshwater and coastal. Table A contains names of at least ten freshwater wetlands (swamps) and many of the 68 coastal waterbodies in watersheds 03040207, 03050202, 03050208, and 03060109 are all or partially wetlands. Impacted wetlands will be given high priority for control in implementation of the NPS Management Program. *Wetlands Habitats There are approximately 4,659,000 acres of wetlands in South Carolina. This represents approximately 23 percent of the State's total area and comprises approximately 12 percent of the wetlands in the southeastern United States. Dominant wetlands types in South Carolina are intertidal emergent wetlands--saltmarshes and palustrine forested wetlands--swamps and bottomland hardwood forests. Wetlands provide many and diverse functions: flood water storage, sediment trapping, nutrient removal, groundwater recharge, aquatic food chain support, fish and wildlife habitat, and shoreline stabilization. Wetlands are also valuable for their educational uses and their intrinsic qualities. *Regulatory Programs The main mechanisms for wetlands protection in South Carolina are through federal and State regulatory programs for the discharge of dredged or fill material and activities in critical areas in the coastal zone. 44 Following is a brief description of these existing federal and State programs and their relationship to wetlands protection. Section 404 of the federal Clean Water Act requires a permit for discharge of dredged or fill material into waters of the United States. The U. S. Army Corps of Engineers administers this program in South Carolina; the U. S. Environmental Protection Agency has ultimate authority in that it may prohibit use of a disposal site if the discharge will have an adverse impact on municipal water supplies, shellfish beds and fishery areas, wildlife, or recreational areas. This permitting program applies to activities in navigable waters, their tributaries, and wetlands adjacent to these waters. Fills of less than 1.0 acres into isolated wetlands are covered under a Nationwide Permit issued by the Corps and certified by S. C. Department of Health and Environmental Control . Projects of 1-10 acres in size must notify the Corps of Engineers to see if a permit is needed. Section 401 of the Federal Clean Water Act requires any applicant for a federal license or permit to conduct an activity which may result in a discharge to navigable waters to receive certification from the State that the discharge will not cause a contravention of the State's water quality standards. S. C. Department of Health and Environmental Control is the agency which issues certification in South Carolina. Those activities in wetlands adjacent to navigable waters which require Section 404 permits also require certification. The Department evaluates whether or not the proposed activity will adversely impact the wetlands itself or adjacent waters due to loss of wetlands functions. South Carolina Coastal Council reviews Section 404 permits as well as administers its own permit program for projects within critical areas in the Coastal Zone. Critical areas are saline waters subject to tidal ebb 45 and flow, tidelands, beaches, and primary ocean front dunes. Coastal Council provides additional protection to isolated freshwater wetlands in the eight coastal counties through review of applications for Section 404 permits under Corps Nationwide Permit Number 26 where the activity will result in the discharge of dredged or fill material and cause the loss or modification of 10 acres or less of non-tidal waters above stream headwaters or in isolated waters, including wetlands. The South Carolina Heritage Trust Program is responsible for surveying and inventorying rare or vanishing plant and animal species and plant and natural communities. This includes wetlands communities, and the Heritage Trust Program has had a particular interest in Carolina Bays. The program provides protection to special areas through acquisition, easement, or l and owners cooperation. *Wetlands Legislation South Carolina Water Resources Commission has submitted proposed legislation for consideration by the South Carolina General Assembly. Only wetlands adjacent to streams with an annual flow greater than 5 cfs would be regulated and only certain activities such as dredging, deposition, construction of structures, and hydrologic modification would require permits. Certain activities are exempt under this proposed legislation. *Wetlands Mapping and Inventory A complete inventory of wetlands in South Carolina is important so wetlands in the State can be identified and classified. When this survey has been completed, State and federal agencies, the public, and the Legislature can evaluate the status of wetlands based on accurate and detailed assessment. Currently, this type of detailed information is not available on a statewide basis. 46 In 1986, S. C. Coastal Council and U. S. Army Corps of Engineers entered into an agreement with U. S. Fish and Wildlife Service to identify and map wetlands resources within eight coastal counties: Horry, Georgetown, Charleston, Berkeley, Jasper, Beaufort, Dorchester, and Colleton. These maps identify major wetlands systems, hydrologic conditions, vegetative type or substrate, and other characteristics such as modifiers to hydrology, water -chemistry, and/or man's influence an wetlands. The boundary of each wetlands area was identified using aerial photography, field checked and delineated by wetlands type, on U. S. Geological Survey 7.5 minute topographic maps. In 1987, S. C. Coastal Council and S. C. Land Resources Conservation Commission (LRCC) entered into an agreement whereby LRCC will digitize completed wetlands inventory maps. By digitizing these data, statistical analyses can be performed and an accurate inventory, including acreage of each wetlands area identified, number of similar wetlands within the State, county, and topographic quadrangle, and total number of wetlands acres by type or groups can be obtained. This type of statistical information is far reaching and will prove invaluable to the public and, in particular, natural resource users, planners, and legislators. Furthermore, once the wetlands have been identified and digitized into a computer format, an accurate inventory can be maintained in a cost effective manner. Identifying wetlands changes on aerial photographs and updating computer files (maps) as needed is relatively easy once the map and inventory data are entered (digitized) and stored in a computer. New statistical information can be easily generated by the computer software and a cost effective method of monitoring loss or creation of wetlands within the State becomes feasible. 47 *Education and Research South Carolina Sea Grant Consortium supports research pertaining to wetlands. They provide scientific information to regulatory/management agencies as well as educational information to the general public. The Consortium is currently preparing new educational materials on wetlands including a video tape, a slide show, and a brochure. *Governor's Freshwater Wetlands Forum Governor Carroll A. Campbell, Jr., of South Carolina was a member of the National Wetlands Policy Forum. In response to recommendations from the National Forum, Governor Campbell has convened a State Forum to develop a wetlands policy for South Carolina. His goal is to define wetlands, identify and inventory wetlands in South Carolina, and provide protection. Governor Campbell supports the goal of the National Forum of "no net loss of the nation's remaining wetlands base." The State Forum is comprised of representatives from the Legislature, State regulatory agencies, agriculture, industry, and environmental interest groups. 48 CHAPTER 7 PROCESS FOR DEFINING BEST MANAGEMENT PRACTICES Best Management Practices (BMPs) for controlling nonpoint sources of pollution are defined as methods, measures, or practices which have been determined to be the most effective and practicable means of preventing or reducing water pollution to a level compatible with State water quality goals. They include, but are not limited to, structural and non-structural controls and operation and maintenance procedures. There were seven categories of NPS pollution identified in the Assessment as impacting the State's waterbodies and groundwaters including agricultural activities, forestry activities, construction activities, urban runoff, mining activities, land disposal activities, and hydrologic/wetlands modification activities. BMPs for each category will be identified in the NPS Management Program. The South Carolina Department of Health and Environmental Control, DHEC is the lead oversight agency for the Clean Water Act, Section 319, NPS Management Program. The NPS staff of the Bureau, as part of the NIPS Manaaement Prouram document preparation, will compile a list of appropriate BMPs to reduce pollution from each of the seven Assessment identified categories of NPS pollution. Recommended BMPs will be those known to impact water quality positively. Lists will be compiled an the advice of and after consultation with federal, State, and local agencies identified as having an implementing role in the control of NPS pollution in South Carolina. The lists will be further refined with input from cooperating agencies which have membership on the State 49 NPS Task Force. The public will also have input through the review and comment process. Agencies having an implementing or advisory role in NPS pollution control are listed below: Federal Aaencies 1. USDA Soil Conservation Service 2. USDA Agricultural Stabilization and Conservation Service 3. U. S. Forest Service 4. U. S. Army Corps of Engineers S. U. S. Geological Survey 6. USDA Agricultural Research Service State Auencies 1. S. C. Department of Health and Environmental Control 2 S. C. Forestry Commission 3. S. C. Coastal Council 4. S. C. Land Resources Conservation Commission 5. S. C. Water Resources Conservation Commission 6. Clemson University Pesticide and Fertilizer Control 7. Clemson University Cooperative Extension Service 8. Clemson University Department of Agricultural Engineering 9. S. C. Wildlife and Marine Resources Department 10. Governor's Office of Energy, Agriculture, and Natural Resources Local Aaencies 1. Soil and Water Conservation Districts 2. County governments 3. Watershed Conservation Districts Several of the categories previously mentioned are regulated in this State. They include surface mining, land disposal (landfills, land application of 50 wastewater and sludge, and individual sewage treatment and disposal systems), and hydrologic/wetlands modification. Further, construction/urban stormwater runoff are regulated by county ordinance where ordinances are in force, construction/urban stormwater runoff/forestry activities are regulated on State owned lands, and certain agricultural waste activities are permitted. Federal regulations may also apply, for example U. S. Army Corps of Engineers regulations pertaining to hydrologic/wetlands modification. When regulatory programs cover an activity, BMPs are mandatory rather than voluntary. The practices may be defined in the regulation itself or described in accompanying guidance. A guidance document is being developed for land application or wastewater facilities which will describe 8MPs to protect both surface and groundwater. The NPS Manaciement Prociram will include a list of tasks with accompanying schedules for the four-year program period. Many of these tasks will address BMP related topics such as research in developing new technology, testing effectiveness, demonstrations, and promoting voluntary use. The NPS Manaciement Prociram will target and prioritize waterbodies/watersheds named in the NPS Assessment list for implementation of BMPs over the next four years. As these watershed implementation projects take place, appropriate BMPs will be selected depending upon the category or categories of NPS impacting the watershed. A team approach will be utilized, with implementing and coordinating agencies assessing needs and selecting BMPs which are appropriate for use in the watershed. Local coordination of BMP implementation will be stressed; in most cases the Soil and Water Conservation District will be be key contact. Public involvement will be sought. Ultimate implementation of BMPs depends on cooperation by the landowner. Whether he is a farmer, contractor, logger, etc., the landowner will ultimately determine the use of BMPs an his land. Therefore, control measures will be refined to fit his 51 needs. DHEC NPS staff will provide leadership and overall coordination during the implementation process. To summarize, the South Carolina NPS Management Program will solicit input from many different groups (governmental agencies, landowners, etc.) in determining and identifying BMPs for NPS control. The process will be flexible enough to allow modifications for use in various types of watersheds and to meet individual needs. 52 CHAPTER 8 STATE AND LOCAL NPS PROGRAMS Numerous State and local agencies administer programs which, as a primary or secondary goal, help to reduce nonpoint source pollution. Implementation of best management practices and controls will require the coordinated effort of these agencies. The NPS Management Program will focus on interagency cooperation, voluntary compliance, mandatory compliance, and public education/awareness in order to effectuate implementation of BMPS and consequent improvement in the State's water quality. A total of seven categories of NPS pollution have been identified in this Assessment as impacting the State's waters including those from the following activities: agriculture, forestry, urban runoff, construction, surface mining, land disposal, and hydrologic/wetlands modification. Types of programs carried out by agencies involved with NPS pollution fall under five general types: technical assistance, regulation, education/information, financial assistance, and research/monitoring. Following is a detailed description of these State and local programs by NPS category. State and Local Proarams Relatina to Auricultural NPS *Technical Assistance The South Carolina Land Resources Conservation Commission (LRCC) is the implementing agency for the S. C. Erosion and Sediment Reduction Act (Ch. 18, Title 48, Code of Laws 1976) and as such is designated as the State agency responsible for developing, coordinating, and promoting erosion and sediment 53 reduction in the State. Through the Soil and Water Conservation Law, LRCC coordinates the activities of the 46 Soil and Water Conservation Districts (SWCD) in the State and provides demonstrations and technical assistance for implementing soil and water conservation programs in conjunction with SWCD, local governments, and other entities. LRCC also provides technical assistance to 58 Watershed Conservation Districts (WCD) established in the State. Clemson University is the State's land grant institution. The Cooperative Extension Service at Clemson provides technical assistance and serves as a vehicle for technology transfer through educational demonstrations and individual contact with farmers. Each county in the State has a local County Extension Office and this office often coordinates with other local entities in providing technical assistance and other programs. The S. C. Soil and Water Conservation Districts Law authorizes the creation of Soil and Water Conservation Districts (SWCDs). Forty-six SWCDs have been organized pursuant to the Law. The boundaries of SWCDs correspond with county boundaries. SWCDs are subdivision of State government. They have the authority to carry out soil and water conservation programs within their boundaries in conjunction with landowners and users and in cooperation with government agencies. The work of each SWCD is managed by a board of five non-salaried commissioners for four years. SWCDs focus attention an land, water, and related natural resource problems; develop plans and programs to solve them; secure professional, technical, and financial assistance from public and private sources; and enlist land users and others interested in conservation in accomplishing the goals of the District. SWCDs rely primarily on voluntary action and cooperation to achieve their objectives. The S. C. Watershed Conservation Districts Law authorizes the creation of Watershed Conservation Districts (WCDs). Fifty-eight WCDs have been established pursuant to this Law. Each WCD lies within a specific watershed. WCDs are 54 subdivisions of State governments. They are organized under the supervision of Soil and Water Conservation Districts (SWCDs). The S. C. Land Resources Conservation Commission assists SWCDs in their responsibilities of maintaining the organization of WCDs and carrying out projects. The purpose of WCDs is to develop and administer projects within their boundaries for erosion control, flood prevention, and related needs. Erosion control includes vegetative and structural measures. Flood prevention includes channels and flood retarding reservoirs. Some reservoirs serve additional uses, such as public water supply and recreation. The work of each WCD is managed by a board of five locally elected directors. Terms of office for directors are four years. To assist in the administration of projects, WCDs are authorized to receive funds from taxes levied on real property within the District. *Regulatory Programs SCDHEC's Bureau of Water Pollution Control administers the Agricultural Waste Management Program in cooperation with USDA Soil Conservation Service. This is accomplished primarily through a permitting and inspection program which requires landowners to apply certain best management practices for waste control. Clemson University, Department of Fertilizer and Pesticide Control is responsible for administration and enforcement of the S. C. Pesticide Control Act and the Chemigation Act. The Pesticide Act regulates storage, sale, use, quality control, and numerous other areas related to the use of pesticides. The Chemigation Act regulates application of chemicals through irrigation equipment. Clemson University is involved with licensing, compliant and compliance inspections, and enforcement of these Acts. 55 *Financial Assistance State Conservation Tax Credit legislation provides State income tax credits for the purchase of conservation tillage planters and drip irrigation and for the construction and restoration of water impoundments including those for the purpose of erosion and sediment control. S. C. Land Resources Conservation Commission developed technical criteria for the South Carolina Tax Commission for implementation of this legislation and provides technical and regulatory assistance to landowners and users in planning and installation of the practices. Applicants for the water impoundment tax credit must obtain either a construction permit (pursuant to the S. C. Dams and Reservoirs Safety Act) from LRCC or a certificate of exemption which may be issued by either LRCC or the SWCD in which the impoundment is located. While this is not a true source of financial assistance, the tax credit serves as a financial incentive. S. C. Land Resources Conservation Commission, through the Governor's Office, receives funds from the Department of Energy, Petroleum Violation Escrow Fund to purchase conservation tillage and drip irrigation installation equipment. This equipment is then made available for rent by agricultural landowners for a minimal fee which covers maintenance costs. *Education and Information S. C. Land Resources Conservation Commission publicizes and promotes erosion and sediment guidelines through education and information programs. Educational programs and information transfer are utilized extensively by LRCC. Also, they coordinate activities of the Soil and Water Conservation Districts (SWCD) and provide assistance to the Watershed Conservation Districts (WCD). New and innovative best management practices are tested, demonstrated, and publicized prior to recommendation by LRCC. 56 Clemson University Cooperative Extension Service has provided training courses and other informational programs relating to proper use of pesticides and chenmigation. A brochure on chemigation was developed by the Extension Service in cooperation with Clemson's Department of Fertilizer and Pesticide Control. *Research/Monitoring The research program of the Clemson University College of Agriculture develops new technology for environmentally sound agricultural production. In addition, data for these new practices are collected and analyzed. For example, the Integrated Pest Management Program and the Low Input Sustainable Agricultural Program complement the NPS Management Program. Both of these Programs are developing practices to enhance water quality and reduce production costs. In concert with research programs is the Cooperative Extension Service. The link between these two entities is the Experiment Stations where a large portion of research is conducted. The Extension Service provides technical assistance and serves as a vehicle for technology transfer through educational demonstrations and individual contact with farmers. State and Local Procirams Relatinci to Forestry NPS *Technical Assistance The S. C. Forestry Commission provides technical assistance to non-industrial private landowners. Forestry Commission staff foresters are assigned to each county of the State to assist landowners with proper management of their forest land. 57 *Regulatory Programs The S. C. Forestry Commission has regulatory authority to apply practices of the Erosion. Sediment. and Stormwater Manaciement Plan on State Forest lands administered by the Commission and in advice given to other State agencies that own forest land. *Education and Information The S. C. Forestry Commission and the S. C. Forestry Association have recently cooperated in the development of two publications on Best Management Practices in South Carolina. These publications are designed to promote more awareness and use of BMPs among landowners, industry foresters, consulting foresters, loggers, contractors, and others practicing forest management. Through the cooperation of S. C. Forestry Commission, S. C. Forestry Association, and Clemson University Extension Service, training programs using video and slide tapes are being developed to educate landowners and the forestry community concerning the importance of utilizing BMPs. Separate programs are being prepared for general and specific audiences. State and Local Prourams for Construction NPS *Technical Assistance S. C. Land Resources Conservation Commission, upon request, reviews plans submitted pursuant to the Erosion and Sediment Reduction Act, conducts meetings and negotiations with architect-engineering firms, and provides field inspection services during the construction of projects. LRCC recommends construction BMPs from a technical manual they developed for use during construction projects which covers planning stages through final landscaping, and maintenance. LRCC also provides technical assistance to the staff of the State Engineer's Office. 58 *Regulatory Programs The State Engineer's Office, S. C. Budget and Control Board, is responsible for approving all plans for work in conjunction with the State's permanent improvement projects program (PIP). LRCC is responsible for all projects which fall outside the PIP program and for continuing programs such as Clemson University Experiment Stations and non-federal activities of the S. C. Public Service Authority (Santee Cooper). S. C. Department of Highways and Public Transportation (SCDHPT) has adopted regulations for erosion and sediment reduction and stormwater management on lands and land-disturbing activities under its jurisdiction. S. C. Forestry Commission has also developed a plan based on BMPs for erosion and sediment reduction on State owned lands under its jurisdiction. S. C. Department of Health and Environmental Control (SCDHEC) enforces the EPA requirement that BMPs be implemented during construction of waste treatment facilities which receive federal funds. NPS control measures must be addressed in construction plans and specifications submitted to DHEC for review and approval. Fifteen counties and several municipalities have adopted erosion and sediment control ordinances which regulate construction activities. Other counties and municipalities regulate some construction activities through provisions in subdivision regulations, zoning ordinances, or building permit programs. *Education and Information S. C. Land Resources Conservation Commission provides educational assistance to the staff of the State Engineer in the form of on-the-job training, formal workshops, and handbooks and guides. LRCC has published the technical manual Erosion and Sediment Control Practices for DeveloDinci areas 59 which is utilized as the implementing tool for construction related BMPs by developers, consultants, contractors, etc. State and Local Proarams for Urban Runoff NPS *Technical Assistance S. C. Land Resources Conservation-Commission provides technical assistance to local governments, landowners, developers, and the technical community through workshops, seminars, field visits, and other approaches. LRCC offers technical assistance in identifying and correcting problems, demonstration of conservation technology, and assistance to local governments in developing programs, ordinances, and policies and construction of flood prevention projects. S. C. Coastal Council provides technical assistance to local units of government to achieve more comprehensive implementation of stormwater management guidelines. Two planning services are also provided by S. C. Coastal Council. Through the "Special Area Management Plan" (SAMP), local governments utilize S. C. Coastal Council staff to obtain planning information on existing and proposed development projects. The "Shore Front Management Plan" enables coastal communities to receive assistance relating to beach erosion and coastal development. Soil and Water Conservation Districts (SWCD) are responsible for providing leadership for implementation of local erosion, sediment, and stormwater programs through technical assistance, demonstration, and coordination of efforts among governmental agencies, organizations, and landowners and users. Each SWCD appoints a Local Advisory Council of Erosion and Sediment Reduction. 60 *Regulatory Programs S. C. Land Resources Conservation Commission and S. C. Coastal Council have been designated as coordinating agencies, in conjunction with other federal, State, and local agencies to develop strategies to reduce impacts of urban runoff pollution control. LRCC has responsibility for all non-coastal counties and will work jointly with S. C. Coastal Council to develop strategies in coastal areas. The S. C. Erosion and Sediment Reduction Act requires LRCC to implement a statewide erosion and sediment reduction and stormwater management program. Through the S. C. Coastal Zone Management Act of 1977, S. C. Coastal Council was authorized to develop a Coastal Zone Management Program and review all federal and State permit applications to ensure compliance with the Program. The South Carolina Coastal Council Stormwater Mananement Guidelines is utilized as the BMP guideline for reviewing development proposals requiring permit and certification decisions within the coastal zone. These guidelines are based upon authority of policies and regulations set forth in the South Carolina Coastal Zone Management Program. S. C. Department of Health and Environmental Control considers potential for contamination of stormwater runoff from municipal, private, domestic, or industrial waste treatment plant sites prior to issuing NPDES permits or State construction permits. Where necessary, DHEC requires BMPs to control runoff. Local Advisory Councils on Erosion and Sediment Reduction in each Soil and Water Conservation District are charged with examining erosion, sediment, and stormwater problems, reviewing existing programs and recommending new approaches, and assisting in program development and implementation. Eighteen counties and several municipalities have adopted erosion and sediment control and/or storm drainage ordinances. These sediment control 61 ordinances have been adopted pursuant to the County Sediment Control Program Act passed by the General Assembly in 1971. *Financial Assistance S. C. Land Resources Conservation Commission provides financial assistance to communities through State appropriations for flood prevention projects which include benefits of improved stormwater management and better operation of individual sewage treatment and disposal systems and public sewer systems. Projects are implemented in conjunction with SWCDs, local governments, USDA Soil Conservation Service, and landowners. *Education and Information S. C. Land Resources Conservation Commission staff are involved in development of technical standards and manuals, educational materials, and demonstration of conservation technology. LRCC has also established a network of computer hardware and software to provide technical support for their staff. Collaborative efforts have been established with university engineering departments to form a strong base for assisting communities and local governments having a need for new technology in erosion and sediment control and stormwater management. S. C. Coastal Council has published South Carolina Coastal Stormwater Manaaement Guidelines. This booklet provides information necessary for individuals to gain a clear understanding of compliance requirements which pertain to various classes of projects. 62 State and Local Proarams for Minin NPS *Technical Assistance S. C. Land Resources Conservation Commission provides technical assistance to mine owners and operators concerning design and installation of BMPs during mining and reclamation. The staff has the expertise to provide site-specific information including design and construction of sediment and erosion control structures, hydrologic monitoring and recharge devices, wildlife protection and habitat restoration, and various types of reclamation. *Regulatory Programs S. C. Land Resources Conservation Commission has been designated primary regulatory responsibility for administering and implementing the South Carolina Mining Act and its implementing regulations. Enforcement of the Act is through approval of reclamation plans, issuance of mining permits, collection of reclamation bonds, regulate inspection of mining operations, development of technical standards, and publishing of informational manuals. The South Carolina Mining Council coordinates activities associated with administration of the Mining Act with LRCC. This is an independent body, created by the South Carolina Legislature, with members from State government, the mining industry, non-governmental conservation interests, and water and air resource management. The Council's responsibilities include promulgating rules and regulations providing for administration of the Act and serving as first line of appeal for any decision or determination made by LRCC. Certain mining activities require NPDES permits and State wastewater construction permits which would be administered by DHEC. *Education and Information S. C. Land Resources Conservation Commission is involved in research to develop or refine technical standards. Information gained from research 63 projects is distributed to mine operators as part of an overall goal of education. Seminars are held for mine operators to enhance knowledge of the Mining Act and usage of BMPs. LRCC has published several booklets including a handbook of recommended practices for mine operators. LRCC conducts technical programs for radio, television, civic groups, and schools to improve public awareness of mining. State and Local Procirams Related to Land Disoosal Activities *Technical Assistance S. C. Department of Health and Environmental Control, Bureau of Solid and Hazardous Waste provides technical assistance to municipalities, counties, and industry in designing and operating landfills to protect surface and groundwater quality. A guidance document compiling updated BMPs for land application of treated wastewater and sludge is being developed by DHEC's Bureau of Water Pollution Control. Technical guidance will be given for use of the consulting community in order to facilitate proper geohydrological design of land application systems regarding protection of groundwater quality. A similar document titled Land ADolication of Sludcie is currently available. *Regulatory Programs Regulatory authority over solid waste disposal activities resides with S. C. Department of Health and Environmental Control, Bureau of Solid and Hazardous Waste. Bureau staff provides technical assistance to municipalities, counties, and industry in designing and operating landfills in a more effective manner. 64 Disposal of -solid waste is regulated through the domestic and industrial solid waste regulation promulgated under authority of Section 44-1-140 of the South Carolina Code of Laws, 1976, and the South Carolina Pollution Control Act. These statutes require that all solid waste disposal facilities obtain a written authorization (permit) from DHEC prior to commencing operation. Application for a permit includes submission of a comprehensive engineering report which requires use of best management practices and addresses such items as site specifications, potential pollution hazards, geological and hydrological conditions, and other relevant factors which enter into site design, construction, and operation. All permitted sites are closely monitored and inspected an a regular basis to ensure compliance with State regulations. Facilities which do not meet State standards are sent a compliance schedule either to correct deficiencies or close the site. S. C. Department of Health and Environmental Control, Bureau of Water Pollution Control regulates land application of treated effluent and land application of sludge through its permitting programs. The most common method of applying wastewater is by spray irrigation. Treated effluent is sprayed through nozzles and infiltrates and/or percolates into the ground at a disposal site. Most of the water is evaporated into the atmosphere, and nutrients are taken up by plants growing on the site. State construction and operating permits are required for these facilities. The permitting group applies criteria set forth in Minimum Site Suitability Reauirements for Sorav Irriciation of Domestic Wastewater which serve to protect Class GB (suitable for drinking water supply) groundwater standards. Also, S. C. Coastal Council reviews these permits and may apply practices set forth in their Stormwater Manaciement Guidelines. 65 The individual sewage treatment and disposal (ISTD) systems program is regulated by S. C. Department of Health and Environmental Control, Bureau of Environmental Health, Division of General Sanitation. Construction of ISTD systems is strictly regulated in accordance with standards set forth in State Regulation 61-56, Individual Waste Disposal Systems; State Regulation 61-56.1, License for Contractors Constructing On-Site Sewage Treatment and Disposal Systems; and State Regulation 61-57, Rules and Regulations Governing the Development of Subdivision Water Supply and Waste Disposal Systems. These regulations govern the design, construction, and installation of ISTD systems. ISTD systems are not permitted if soil, water table, rock, and other conditions do not meet minimum site criteria. Statewide, approximately three percent of ISTD system permit applications are denied annually, but the rate increases to ten percent along the coast because of high water tables and impermeable clay soils. ISTO systems are not allowed if sewer connection is accessible, and septic tank effluent may not be discharged to any stream or other waterbody. *Education and Information Recognizing the need for solid waste disposal solutions, the South Carolina Legislature formed a Solid Waste Task Force. It is made up of seventeen members representing the public and private sectors and is composed of legislators, legislative appointees, and Governor's appointees. The Task Force is considering several options concerning waste recycling and resource recovery (generation of energy from waste material). One of these options is to make recycling mandatory. A tax would be charged on all non-recyclable containers. S. C. Department of Health and Environmental Control, Division of General Sanitation has initiated educational and training efforts in several areas. District and county ISTD program personnel are trained and certified to identify soil texture, rock, restrictive horizons, and seasonal high water table 66 indicators to accurately evaluate sites for system installation. Contractors must pass an examination before receiving a required license to install ISTD systems. Subdivision of land is evaluated and approved prior to sale, for the best possible method of water and sewage treatment and disposal. ISTD system educational materials are available for public distribution and use. A booklet titled Individual Sewaae Treatment and DisDosal in South Carolina explains in layman's terms how a septic tank (ISTD) system works and a brochure titled Gettina to Know Your Seotic System explains proper maintenance procedures. *Research/Mon itori ng In cooperation with the University of South Carolina, the Division of General Sanitation is currently conducting research of conventional, alternative conventional, and innovative/alternative ISTD systems to assess their workability and to what extent current standards and practices are not adequately protecting surface and subsurface waters. The study will also identify new technologies which will allow use of ISTD-systems on otherwise unsuitable sites. Results of the research are expected before 1992. State and Local Procirams Related to Hvdroloaic/Wetlands Modification *Regulatory Programs 1. State Budget and Control Board Permit for Construction in Navigable Waters As set forth in Regulation 19-450, S. C. Code of Laws 1976, a permit issued by S. C. Budget and Control Board is required for any construction, alteration, dredging, filling, flow alteration, or other activity, unless expressly exempted, when such activity involves or will involve use of any navigable 67 waterway of the State. On behalf of the S. C. Budget and Control Board, S. C. Water Resources Commission serves as coordinating agency in administering permit procedures. Where applicable, issuance of the State permit may be conditioned upon approval of such additional licenses, permits, or authorization by the responsible State agencies. In those instances where the applicant must obtain federal authorization from the Ui. S. Army Corps of Engineers under Sections 9, 10, 13, or other relevant provisions of the River and Harbor Act, or Section 404 of P. L. 100-4, the Clean Water Act, notice of applications are jointly issued by this federal agency and the State and no separate application is required for the State permit. Where State and federal jurisdictions coincide, application to the federal permitting agency constitutes automatic application to the State. S. C. Water Resources Commission is charged with notifying relevant State agencies of permit applications and seeking and evaluating such agencies' comments on the applications. Each agency is considered to be individually responsible for their area of interest. Based on the evaluation of comments from other agencies and their own findings, S. C. Water Resources Commission may recommend denial, conditional approval, or approval of the permit to the S. C. Budget and Control Board. The Commission is prohibited from recommending a permit for any activity which S. C. Department of Health and Environmental Control determines would violate State Water Classification and Standards or endanger the public health or where consistency certification is denied by S. C. Coastal Council. The method of implementing Best Management Practices is by stipulating those erosion or sediment controls or other requirements which must be met on the permit. These controls are applied on a case-by-case basis, based on the project. A substantial number of permits are issued annually which contain specific erosion or siltation conditions requested by S. C. Department of Health 68 and Environmental Control, S. C. Wildlife and Marine Resources Department, S. C. Coastal Council, or S. C. Water Resources Commission for protection of water quality or fish and wildlife habitat within navigable waters. The S. C. Budget and Control Board permit regulates all activities related to hydrologic modification. Jurisdiction excludes, however, those activities which take place beyond the navigable waters of South Carolina, i.e., those waters defined as non-navigable and those wetlands which are above the ordinary or mean high water mark of a watercourse unless such activities directly and significantly affect a State navigable waterway. 2. Coastal Council Permit The Coastal Zone Management Act authorizes S. C. Coastal Council to promulgate regulations concerning hydrologic modification within the critical saltwater zone of the State's 'coastal counties. These regulations are set forth in "Permitting Rules and Regulations." S. C. Coastal Council was created by the 1977 South Carolina Coastal Management Act to protect the quality of the coastal environment and to promote the economic and social improvement of the coastal zone and of all the people of the State. On September 29, 1977, permitting authority of S. C. Budget and Control Board in the Coastal Zone of the State was transferred to S. C. Coastal Council. After this date, no person may utilize a critical area for a use, unless expressly exempted, other than the use the critical area was devoted to on that date unless he first obtain a permit from S. C. Coastal Council. No person shall fill, remove, dredge, drain, or erect any structure or in any way alter a critical area without such a permit. Critical areas include: (1) coastal waters, (2) tidelands, (3) beaches, and (4) beach/dune system (the area from the mean high water mark to the setback line as determined in Section 48-39-280 of the 1988 Coastal Zone Management Act). The Coastal Zone, or the area of the State under planning jurisdiction of S. C. Coastal Council, includes all coastal waters and submerged lands seaward to the 69 State's jurisdictional limits and all lands and waters in the counties of the State which contain one or more of the critical areas. The counties are Beaufort, Berkeley, Charleston, Colleton, Dorchester, Horry, Jasper, and Georgetown. The regulations establish specific project standards for docks and piers; boat ramps; bulkheads and seawalls; cables, pipelines, and transmission lines; marinas; highway, road, and bridge construction; dredging and filling; navigation channels and access canals; deposition of dredged material; sewage lagoons or impoundments; marsh impoundments for recreational commercial activities; and drainage canals or ditches. S. C. Coastal Council has also prepared and implements "Stormwater Management Guidelines."I This document is organized in two major sections. The first section describes types of activities which are regulated and corresponding requirements and restrictions. Criteria such as location, -lot coverage, and land use determine permit requirements. A chart at the end of the section summarizes the activities which require stormwater management and which BMPs and controls are required for each activity. The second section presents basic design standards and requirements for stormwater management systems. Requirements for retention and detention systems with their corresponding design criteria are discussed. It also outlines other best management practices necessary for managing stormwater and includes discussions on such topics as freshwater wetlands stormwater management systems and sediment and erosion control practices. S. C. Coastal Council regulations are very similar to S. C. Budget and Control Board regulations and adequately regulate hydrologic modification activities which have a potential for degradation of water quality in the Coastal Zone of South Carolina. Unlike S. C. Budget and Control Board jurisdiction, the S. C. Coastal Council program includes all waters and adjacent wetlands within the saline areas. All projects requiring State and federal permits in the Coastal Zone must be consistent with the Coastal Zone Management 70 Program. The regulations and specific project standards provide a structure for application of Best Management Practices. 3. DHEC 401 Water Quality Certification S. C. Department of Health and Environmental Control, Bureau of Water Pollution Control, reviews applications for inclusion of best management practices, when and where needed, on federal permits for certain types of activities in and around waterbodies. .Section 401 of the federal Clean Water Act requires that all applicants for a federal permit or license which may result in a discharge to navigable waters obtain certification from DHEC. The certification ensures that the project will be conducted in a manner which will not violate State water quality standards. The Department issues certification for primarily three types of projects: U. S. Army Corps of Engineers Section 10 (navigation), Section 404 (dredge and fill permits/U. S. Coast Guard permits, and Federal Energy Regulatory Commission licenses for hydroelectric projects. These activities are categorized as hydrologic modification. Certification is routinely issued with conditions which become part of the federal permit or license. These conditions usually address nonpoint pollution sources, especially sediment loss and stormwater impacts to a waterbody. The Department also routinely reviews plans for highway and utility line construction. Certi- fication conditions include that effective nonpoint control measures be imple- mented during and after construction to minimize sediment loss to affected waterbodies. DHEC must also certify S.C. Budget and Control Board permits and Coastal Council pemits. Without that certification, those permits cannot be issued. *Education and Information Governor Carroll A. Campbell, Jr., of South Carolina, served as a member of the National Wetlands Policy Forum. In response to recommendations from the National Forum, Governor Campbell established a State Forum to develop a 71 Wetlands Policy for South Carolina. His goals are to define wetlands, identify and inventory wetlands in South Carolina, and provide protection to these areas. Governor Campbell supports the National Forum goal of "No net loss of the nation's remaining wetlands base." The State Forum is comprised of represen- tatives from the legislature, agriculture, State regulatory agencies, industry, and environmental interest groups. Recommendations concerning NPS for the Forum will be incorporated into the NPS Management Program. S. C. Sea Grant Consortium supports research pertaining to wetlands. They provide scientific information to regulatory and management agencies as well as educational information to the general public. The Consortium is preparing educational material on the function and value of wetlands including a video tape, slide presentation, and brochure. One aspect of these educational materials will discuss how NPS pollution threatens the valuable wetlands resource. NPS funds are being used to partially finance this project. It will be utilized as part of the NPS Management Program. The S. C. Sea Grant Consortium publishes a quarterly newsletter titled Coastal Heritane. This publication has a readership of several thousand. Cross Catenorv State and Local Procirams *Financial Assistance The South Carolina Heritage Trust is a program within the S. C. Wildlife and Marine Resources Department. Its primary functions are to inventory, evaluate, and protect significant natural areas and critical sites which harbor rare or endangered species. Through donation, acquisition, by purchase, or registration, the lands that are entered into the Heritage Trust Program are protected by the State and are maintained in their natural conditions. Prohibition of further development along with eliminating the application of pesticides and fertilizers on these lands significantly reduces the chances of nearby streams, rivers, lakes, estuaries, or wetlands becoming polluted by nonpoint sources. 72 *Education/Informati on The Charleston Harbor Estuary Citizen's Committee is a group of concerned individuals whose primary goals are to maintain and enhance water quality in Charleston Harbor by raising public awareness of sources of possible pollution such as point sources, urban stormwater runoff, and other sources of NPS pollution. There is a NPS Subcommittee whose specific interests lie in identifying problems and offering alternative solutions. A member of thi s subcommittee is also a member of the NPS Task Force. Recommendations of the NPS Subcommittee will be incorporated into the NPS Management Program where applicable. The South Carolina Water Watch Program is an intra-agency and citizen's group effort coordinated through the Governor's Office and the South Carolina Water Watch Committee. This program provides individuals with a hands-on opportunity to learn more about their water resources. The more working experience citizens have with their community's water resources, the better they can detect problems, form opinions, and express their views. The basic components of the Water Watch Program are awareness, education, and action. Through Water Watch projects, active citizens can voice their concerns to federal, State, and local officials, industry, and operators of municipal water and wastewater treatment facilities. A well informed citizenry that understands and supports pollution prevention programs and more efficient treatment facility operations acts as an early pollution detection system and helps ensure their community dollars are being spent wisely. Most of the work performed by local groups participating in this program have consisted of water quality monitoring and assessment, although some projects have been involved with NPS pollution. These efforts have consisted of monitoring sedimentation problems in streams, reporting them to appropriate State agencies, and working with local governments 73 in land use planning around streams. The NPS Management Program plans to utilize this group in public education and information efforts. Project Wild Aquatic is a national wildlife conservation educational program facilitated through S. C. Wildlife and Marine Resources Department. SCWMRD personnel conduct workshops for both elementary and secondary teachers and facilitators. In these workshops, instruction for teaching Project Wild Aquatic curricula in the classroom is given. SCWMRD personnel are currently in the process of developing some supplemental curricula to accompany the standard workbook which are more localized to South Carolina in scope. This would be an excellent avenue through which NPS education could be provided to our teachers to pass on to our school children. Project Learning Tree is another national program implemented by a State agency. S. C. Forestry Commission facilitates this program, which is primarily oriented toward education about trees. It is very similar to Project Wild Aquatic in organization and goals. It would be an excellent vehicle through which education about potential NPS problems from silvicultural activities could be provided. *Research/Moni tori ng S. C. Department of Health and Environmental Control conducts two related monitoring programs which benefit the NPS Management Program. Long-term trend monitoring is accomplished through the Fixed Monitoring Network which consists of Primary Stations, Secondary Stations, Sediment Stations, Basic Water Monitoring Program Stations, and Biological Monitoring Stations. Data collected by this Network are used in development of designated use classifications and water quality standards, which are in turn used to establish specific waterbody use classifications. Review of these trend data help determine if existing water quality is adequate to protect existing and designated uses and if 74 appropriate standards have been set. The trend monitoring network established a basis for the NPS Assessment. Special Intensive Surveys are designed to address and answer special concerns such as NPS impacts. They are used to assess current conditions, substantiate enforcement decisions, follow up specific actions, respond to complaints, or short term problems. They are often initiated to investigate apparent problems indicated by trend monitoring data and to determine the cause of non-support of designated uses. The data typically collected during such surveys can be physical and chemical water quality parameters, hydraulic stream characteristics, biological sampling, effluent and compliance sampling, and toxicity testing. Several intensive surveys will be conducted during the Program for assessment and evaluation purposes. The South Carolina Water'Resources Research Institute is a unit of Clemson University. Its objectives are to evaluate research needs, motivate and support research by qualified scientists, and provide for technology transfer. This Institute has funded five scientific studies dealing with various aspects of NPS pollution in South Carolina. Recent studies have involved pesticide runoff from tomato fields and stability of particles on steep slopes. SCWRRI plans to continue and expand its involvement with research of NPS problems. Results of this research will be incorporated into the NPS Management Program where applicable. Stream surveys have been conducted by S. C. Wildlife and Marine Resources Department, Freshwater Fisheries Section since the early 1970's. The information gathered consists primarily of a list of fish species, substrate type, basic water quality data, and surrounding land use. Well over 1000 streams have been surveys primarily on a one-time basis. At present, the data is stored in a computer database, and SCWMRD staff is working to have it entered into a geographical information system (GIS). Also, methods of changing and 75 improving collections are being investigated. When a stream is designated for action by the NPS Task Force, it would be appropriate, in many cases, for SCWMRD Freshwater Fisheries personnel to update the stream database within the existing SCWMRD program. More extensive studies could also be undertaken as a cooperative effort with DHEC and/or other appropriate agencies. If a stream is designated for NPS action in which no survey has been conducted, this would certainly be justification to do so. 76 CHAPTER 9 FUTURE PROCESSES The NPS Manaaement Proaram, first developed in August 1988 and revised in May 1989, includes a schedule containing annual program goals and milestones for a four-year program designed to reduce nonpoint source impacts from the major pollutant categories. This program will expand upon and update the existing management program. A Nonpoint Source Task Force consisting of representatives of agencies regulating NPS or having related programs has been established to assist in formulation and implementation of the program. The NPS Assessment identifies waterbodies in South Carolina impacted by nonpoint source pollution and the category of that NPS. It does not, however, attempt to identify specific source(s) of pollution. The NPS Assessment list of waterbodies has been prioritized based on several factors which are discussed in the Management Program document. High priority waterbodies are targeted for further NPS evaluation or control programs. Types of additional assessment which may be made, depending on needs, include: 1. Prepare annual NPS progress reports which will include updates of assessment activities. 2. Develop a Statewide groundwater monitoring network to assess NPS pollution impacts and water quality improvements resulting from BMP implementation. 3. Monitor effects of agricultural practices, including best management practices, on groundwater. 4. Accumulate information on concentrations of pesticides in surface water and groundwater through computer modelling. Models can 77 determine potential concentrations of this pollutant, including areas which do not exhibit significant soil loss but are close to sensitive waters. 5. Develop and implement a comprehensive and flexible biological and water quality monitoring program and methodology to evaluate the impact of NPS pollution and the effectiveness of BMPs in improving degrading water quality or preventing NPS impacts. 6. Evaluate, in targeted waterbodies, improvements/benefits in biological communities and/or water quality or water use. 7. Monitor and assess NPS pollutant load reductions in selected targeted sites before and after implementation of BMPs. Evaluate cost effectiveness of such programs in targeted areas. 8. Update target watershed/waterbody lists based on consideration of new NPS assessment information or study date. 9. Continue to utilize predictive modelling techniques, such as a Geographic Information System (GIS), to identify and rank land areas for potential NPS impact on waterbody biointegrity and water quality. 10. Evaluate South Carolina coastal waterbodies for NPS impact using DHEC bacteriological data from fixed shellfish monitoring stations. 11. Study the cumulative effect of runoff on drainage basins. Flowing water may dilute NPS pollutants, while cumulative effects on downstream receiving waters can be significant, resulting in NPS accumulations which are far away from the sources. This process could influence identification of areas selected for controls as well as selection of the control methods, e.g., controls at downstream receiving waters versus controls at the sources. 12. Increase information on content of nutrients in surface runoff. This would involve the use of soil test data in conjunction with computer 78 modelling to determine the potential of nutrient delivery to waterbodies. 13. Quantify streambank erosion and its effect on water quality. 79 CHAPTER 10 PUBLIC PARTICIPATION The U. S. Environmental Protection Agency's Nonpoint Source Guidance specifies that other agencies and groups with water quality and resource interests be actively involved in identifying NPS water quality problem areas and the sources impacting these waters. Further, the State shall issue a public notice on the availability of the Assessment Report for public review and provide opportunity for comment prior to submitting the final report to EPA. We solicited and received input to the Assessment from several State and federal agencies having NPS related programs. The S. C. Land Resources Conservation Commission played a major role in the development of the Assessment through provision of the methodology for identification of potential NPS problem areas.- South Carolina Coastal Council identified several coastal problem waterbodies for the Assessment list, and the 46 local Soil and Water Conservation Districts were given the opportunity to contribute NPS problem areas to the list. We also sent copies of the draft Assessment to State NPS Task Force members and the Soil and Water Conservation Districts for review and comment. The Task Force provides policy and direction for the NPS program. Membership is shown in Table D. The interested public also had opportunity to provide input to the Assessment list and opportunity to comment on the draft version of the Assessment document. Copies of the survey shown in Appendix II were sent to 38 individuals and interest groups. The group names were supplied by the Governor's Office of Energy, Agriculture, and Natural Resources and included local chapters of the Sierra Club, Trout Unlimited, and other related 80 TABLE D NPS TASK FORCE 1. Division of Marine Resources, S. C. Wildlife and Marine Resources Department 2. U. S. Fish and Wildlife Service 3. S. C. Forestry Commission 4. U. S. Forest Service S. Charleston District, U. S. Army Corps of Engineers 6. Department of Agricultural Engineering, Clemson University 7. Department of Fertilizer and Pesticide Control, Clemson University 8. S. C. Land Resources Conservation Commission 9. S. C. Water Resources Commission 10. S. C. Coastal Council 11. Soil Conservation Service, U. S. U. A. 12. S. C. Sea Grant Consortium 13. Division of Energy, Agriculture, and Natural Resources, Office of the Governor 14. Wildlife and Freshwater Fisheries, S. C. Wildlife and M~arine Resources 15. Department of Civil Engineering, University of South Carolina 16. Agricultural Stabilization and Conservation Service, U. S. D. A. 17. Agricultural Extension Service, Clemson University 18. U. S. Geological Survey 19. State Advisory Council on Erosion and Sediment Reduction 20. S. C. Wildlife Federation 21. Bureau of Solid and Hazardous Waste, D. H. E. C. 22. Bureau of Water Pollution Control, DHEC 23. Bureau of Water Supply and Special Programs, DHEC 24. Bureau of Environmental Sanitation, DHEC 81 organizations. Respondents were asked to supply names of waterbodies that are known to be affected by NPS. The response rate was approximately 35 percent. The waterbodies named by the respondents were added to the Assessment list. The draft Assessment was placed in each of the 12 DHEC Environmental Quality Control offices around the State for public review. A public notice was prepared and sent to four newspapers: The State (Columbia), Greenville Nes Charleston News and Courier, and.Florence Mommia News. It was also sent to approximately 400 individuals and groups which receive public notices on other Departmental matters such as Section 401 Certifications. A copy of this public notice is exhibited in Appendix IlI. It explains the purpose and content of the Assessment, lists where it is available for review, and explains how and when to submit comments. The notice appeared in the above mentioned newspapers on July S. Mailing list recipients received it on or before that date. The comment period closed on August 3, thirty days later. We received ten written replies commenting on the draft within the thirty day period. Several commentators wished to add waterbodies to the Assessment list. We added them in most cases. Several commentators wished to add water quality parameters to the sampling regime. We will consider adding them when further NPS sampling is conducted for those parameters for which the DHEC laboratory has analysis capability. A few commentators recommended stormwater sampling, correlation of water quality data with antecedent rainfall data, or biological studies. Again, we will consider these methodologies when further assessment is carried out. Two commentators questioned the inclusion of landfill leachate and underground storage tanks as nonpoint sources. These categories were included because EPA guidance includes them. A number of commentators questioned some of the standards or criteria limits employed for inclusion of NPS impacted waterbodies on the Assessment list. We reviewed our procedures concerning some of these limits and agreed that some changes were necessary. The data were reviewed again based on these changes. Also it was discovered that some errors occurred in Appendix I, NPS Water Quality Parameters. These errors were corrected. Finally, several commentators recommended citizen representation on the NPS Task Force. We added representatives from S. C. Wildlife Federation and the State Advisory Council on Erosion and Sediment Reduction. On December 22, 1988, the Environmental Protection Agency issued Public Notice Number 88-NPS-01-SC requesting public comment on the State of South Carolina's proposed NPS Assessment report and NPS Management Program. A copy of the public notice is included in Appendix Ill. The public comment expiration date was January 22, 1989. Comments on the Program were sent to EPA for their review and forwarded to DHEC NPS staff. No comments pertaining to the Assessment were received by DHEC staff during the comment period. 83 APPENDIX I NPS WATER QUALITY PARAMETERS Parameter Standard or (Criterion) Source Dissolved Oxygen 5 mg/l minimum 1 Suspended Solids 50 mg/l 2 Turbidity 20 mg/l 2 pH 6 - 8 standard units 1 Fecal Coliform 400 organisms/100 ml 1 Biochemical Oxygen Demand (5-day) 5 mg/l 2 Ammonia .025 mg/l (as un-ionized ammonia) 3 Total Phosphorus .1 mg/l 3 Nitrate-Nitrite 1 mg/l 2 Conductivity 500 mhos 2 Iron 1 mg/l 2 Lead .05 mg/l 4 Cadmium .01 mg/l 4 Chromium .05 mg/l 4 Zinc .05 mg/l 4 Nickel .05 mg/l 4 Copper .05 mg/l 4 Mercury .2 ug/l 4 DDT .05 ug/l 4 Aldrin .05 ug/l 4 Endrin .05 ug/l 4 Dieldrin .05 ug/l 4 Toxaphene .05 ug/l 4 Heptachlor .05 ug/l 4 Malathion .05 ug/l 4 Diazinon .05 ug/l 4 Phosdrin .1 ug/l 4 Acid Extractable Organics 4.0 ug/l 4 Volatile Organics 2.0 ug/l 4 Guthion .1 ug/l 4 Trithion .1 ug/l 4 Sources: 1. South Carolina Department of Health and Environmental Control Regulation 61-68, Water Classification Standards System. 1985. 2. South Carolina Department of Health and Environmental Control Criteria based on consideration of existing STORET data. 3. United States Environmental Protection Agency, Oualitv Criteria for Water. 4. Lower limit of detection by DHEC laboratory. APPENDIX II County Completed by Are there List specific waterbodies If there are If there ore List existing List potential significant (streams, stream segnents. effects list impacts list uses from uses from Impacts from NPSs lakes or Impoundments) effect(s) from source(s) from Table C.. Table C.. in your area? Impacted by NPSe. Table A.* Table 8.l yes 1 no unknown 2 Are there likely 3 to be future NPS problems? yes no C 5 H Inown unknown s Comments: List additional comments. waterbodles, the NPS effects, eources and the uses on back of survey form. Table A Table 8 Table C If the use or If the effect Is: Indicate: If the source Is: Indicate: potential use Is: Indicate: Oxygen depletion 1 Urban runoff A Fishing poor) S Lake/impoundment eutrophicatlon 2 Agricutural pesticide application B Fishing moderate) T Collform bacteria conta mination 3 Agricultural fertilizer application C Fishing good) U Sedimentation 4 Agricultural soil erosion D Fishing (unique).s V Toxicity due to pesticides, 5 S/Ivicultural activies E Swimming (poor) W heavy metals, etc. Mining activities F Swimming (good) X Turbid conditions 6 Onsite septic systems G Unknown Y Physical habitat degradation 7 Animal Wastes H Other Z Unknown a Residential Fertilization activitles I Other 9 Hydromodificatlon J Construction site soil erosion K Unknown L Other M *Select as many effects, sources, or usee that apply. *eConsider a fishery unique If It represents a species uncommon to the County such as a trout fishery where wormwater conditions normally prevail or the waterbody supports an endangered or rare species. APPENDIX III PUBLIC NOTICE State of South Carolina Department of Health and Environmental Control Bureau of Water Pollution Control 2600 Bull Street Columbia, South Carolina 29201 (803)734-5300 PUBLIC NOTICE NO.: 1 DATE: July 5, 1988 NOTICE TO RECEIVE PUBLIC COMMENT ON STATEWIDE NONPOINT SOURCE ASSESSMENT In compliance with Section 319(a) of the Clean Water Act of 1987, the Department of Health and Environmental Control has prepared a Statewide Nonpoint Source Assessment. This document lists waterbodies (both surface and ground) that are impacted or potentially impacted by nonpoint source pollution (NPS). NPS differs from point source pollution in that it does not emanate from a discrete source such as a pipe. Examples of NPS include runoff from a plowed field, construction site, or parking lot, and leachate from landfills or failing septic tanks. The list identifies the impacted waterbody and its watershed, the type of pollutant or pollutants impacting the waterbody, and the source (or category) of the NPS pollution. The Assessment also discusses the process for defining best management practices for controlling the NPS and identifies programs both regulatory and nonregulatory that will be employed to achieve implementation of best management practices. This "draft" document is tentative and open to comment from the public. Persons wishing to comment are invited to submit same in writing within thirty (30) days of the date of this Notice to South Carolina Department of Health and Environmental Control, 2600 Bull Street, Columbia, SC 29201, ATTN: NPS Coordinator, Division of Water Quality and Shellfish Sanitation. All comments received by August 3, 1988, will be considered in the formulation of the "final" report. Copies are available for public review at the 12 Department of Health and Environmental Control Environmental Quality Control District Offices during normal office hours. The locations of these offices are: Appalachia I EQC Office Appalachia II EQC Office 220 McGee Road 605 North Main Street Anderson, SC 29621 Greenville, SC 29601 Appalachia III EQC Office Catawba EQC Office 151 East Wood Street 1001 West Grace Street Spartanburg, SC 29304 Lancaster, SC 29720 Central Midlands EQC Office Low Country EQC Office Pearl Lightsey Building 149 Ribaut Square State Park, SC 29147 Beaufort, SC 29902 Lower Savannah EQC Office Pee Dee EQC Office 117 Marion Street, N.E. 3204 Industry Boulevard Aiken, SC 29801 Florence, SC 29501 Trident EQC Office Upper Savannah EQC Office 1000 Air Park Road P-129 One Park Avenue Charleston Hgths, SC 29418 Greenwood, SC 29646 Waccamaw EQC Office Wateree EQC Office 1705 Oak Street Plaza 105 North Magnolia Street Myrtle Beach, SC 29577 Sumter, SC 29151 Please bring the foregoing to the attention of persons who you know will be interested in this matter. United States Environmental Protection Agency Region IV 345 Courtland Street Atlanta,, Georgia Attention: Ms. Beverly Ethridge (404) 347-2126 NOTICE OF RECEIPT BY THE U.S. ENVIRONMENTAL PROTECTION AGENCY OF, AND REQUEST FOR PUBLIC COMMENT ON, THE STATE OF SOUTH CAROLINA-S PROPOSED NONPOINT SOURCE ASSESSMENT REPORT AND MANAGEMENT PROGRAM Public Notice No: 88-NPS-O1-SC Public Notice Issuance Date: December 22, 1988 Public Comment Expiration Date: January 22, 1989 Pursuant to Section 319 of the Clean Water Act, the U.S. Environmental Protection Agency (EPA) is hereby notifying the public of its receipt of, and requesting comments on, a proposed Nonpoint Source (NPS) Assessment Report and NPS Management Program for the State of South Carolina. 1. Background NPS Assessment Reports identify navigable waters within the State which, without further action to control NPS pollution, will not attain or maintain water quality standards. State NPS Management Programs set forth the States' four-year plans for addressing nonpoint sources of pollution. These sources include discharges other than those through confined and discrete conveyances (such as pipes or ditches), and all agricultural stormwater discharges and irrigation return flows. Major nonpoint sources may include, for example, agricultural runoff containing pesticides and fertilizers, runoff from urban areas, and construction projects. State NPS Assessment Reports must include the following: (a) waters within the State impacted by nonpoint sources; (b) the categories or types of nonpoint sources which contribute pollutants to these State waters; (c) the process used for identifying best management practices (BMPs) to control NPS pollution; and (d) the State and local pro grams for controlling nonpoint sources. State NPS Management Programs must include the following: (a) an identification of the BMPs and measures which will be undertaken to reduce pollutant loadings; (b) an identification of the programs to achieve implementation of the BMPs; (c) a schedule containing annual milestones for program implementation; (d) a certification of the State attorney general that the laws of the State provide adequate authority to implement the program; (e) sources of federal and other assistance and funding to support implementation; and (f) an identification of federal financial assistance programs and federal development projects the State will review for consistency with its Management Program. EPA will, within 180 days of its receipt of a proposed NPS Assessment Report or Management Program, either approve or disapprove a NPS Assessment Report or Management Program or a portion of a NPS Management Program. EPA will determine whether the criteria for program approval in Section 319(d)(2), (A)-(D) have been met. In the event that the proposed Program or portion of a Program is disapproved, the State must submit a revised Program to EPA within three months, and EPA must either approve or disapprove the Program or portion of a Program within a subsequent three month period. If EPA disapproves a-proposed Assessment Report, it will allow the State an opportunity to revise the Report in accordance with EPA comments. If an approvable-revised Report is not submitted to EPA in a timely fashion, EPA will, after public notice and opportunity for comment, prepare an Assessment Report for that State. 2. Public Comments Persons wishing to comment on the State of South Carolina proposed NPS Assessment Report and NPS Management Program may do so in writing, within 30 days of the date of this public notice. Comments must be received within the 30 day period to be ensured consideration in the EPA approval or disapproval decision. All coihments should include the name, address and telephone number of the commenter and a statement of the relevant facts upon which it is based. All written comments should be submitted to EPA at the above address to the attention of Ms. Beverly Ethridge, Nonpoint Source Coordinator. The State of South Carolina's proposed NPS Assessment Report and NPS Management Program may be reviewed at the above address between 8:30 a.m. and 4:00 p.m., Monday through Friday. Copies may be reviewed at the address shown below or copies may be requested by writing: South Carolina Department of Health & Environmental Control Environmental Quality Control 2600 Bull Street Columbia, South Carolina 29201 by calling (803) 734-4880. APPENDIX IV ASSESSMENT OF NONPOINT SOURCE POLLUTION BY SEDIMENT Submitted to South Carolina Department of Health and Environmental Control In Partial Fulfillment of Section 319 of the Water Quality Act of 1987 by South Carolina Land Resources Conmission April 12, 1988 TABLE OF CONIENTS Page TITLE PAGE ...........................,.......................i LIST OF TABLES.............................................. LIST OF FIGURES............................................. iii I ~ON ~~~~~~~~~~~~~~~~1 2 16 RESLLTS AND DISCUSSION...................................... 21 APPENDIX A............................................ 39 A~PPENDIX B .........................46 APPENDIX C .........................53 AP/PENDIX D .........................58 LITERATUR~CIED...................... 65 LIST OF TABLES Table Page 1. Comparison of Routed and Measured Sediment Yields for Five Storms on Watershed G, Riesel, Texas (Williams, 1975) ..................................... 9 2. Revised Creams Equation Summary from Foster, et al. (1985) by Barnhisel, et al. (1983) .................... 11 3. Constants Used in Statewide Sediment Yield Model for Calculating Lumped Parameters ............................ 19 4. Weighted Average Comparison by Watershed............... 28 5. Watersheds Containing Abandoned Mine Lands That May Contribute to Nonpoint Source Pollution.............. 36 LIST OF FIGURES Figure Page 1. Prediction Accuracy of the Modified Universal Soil Loss Equation (Williams, 1975) ................ 7 2. Example Watershed Division for SEDIMOT II Simulation (SEDIMOT Design Manual, 1982) ........... 14 3. Prediction Accuracy of Hydraulic Component (SEDIMOT Design Manual, 1982)..................... 15 4. Reservoirs and Streams by Watershed for South Carolina 22 5. General Soil Associations for South Carolina.......... 23 6. Land Use/Land Cover for South Carolina............... 24 7. Example Watershed #20, Reservoirs and Streams............................... 25 8. Example Watershed #20, General Soil Map.............. 26 9. Example Watershed #20, Land Use/Land Cover........... 27 Nonpoint Source Category and Source Identification ABSTRACT To define potential nonpoint source pollution problems in South Carolina, the S.C. Land Resources Conservation Commission (SCLRCC) used a geographic information system (GIS) and a sediment yield model (SEDCAD+) developed by the Earth Resources Data Analysis Systems, Inc. (ERDAS) and the University of Kentucky, respectively. Statewide estimates of sediment yield were derived by combining four spatial data sets (i.e., watershed boundaries, land use/land cover, soil, and hydrology) to develop inputs required by the sediment yield model. As a result of the analysis, hydrologic units, by watershed, were separated into six Major Land Resource Areas (MLRA) and, upon completion of the analysis phase, were further subdivided into four distinct "potential" sediment yield categories. IrRUMION Using ERDAS and SEDCAD+ computer software, estimates of potential sediment yield were calculated for each of the 280 watersheds recog- nized by the USDA, Soil Conservation Service (SCS). To accomplish this task, the SCLRCC incorporated into a GIS the natural resource information needed to generate the required inputs for the sediment yield model. A GIS is designed to incorporate large volumes of spatial data into a single or a series of outputs which, subsequently, can be used in the decision making process. Therefore, the natural resource data needed for this analysis were entered into the computer by importing or digitizing each of the four datasets and storing these data in an I IBM-AT microcomputer. The computer records the digitized features as a series of X,Y coordinates and, using the ERDAS software, these data were converted into grid cells with a resolution of 200 m by 200 m (9.88 acres). The equipment used to perform the GIS analysis included an BM-AT computer with a 310 megabyte hard drive, a Calcomp 9100 series digitizing tablet, a Mitsubishi high resolution color monitor, a Bernoulli data storage system, a Tektronix 4696 ink jet color printer, an Okidata text printer and the ERDAS software. Two additional IBM-AT computers and an IBM OSI-Model 80 were used for data management and sediment yield modeling. OBJECTIVES The objective of this study was to identify potential nonpoint source pollution contributors, by watershed, using the GIS capabili- ties of the ERDAS software and the sediment yield modeling capabili- ties of the SEDCAD+ software. Three sub-objectives were used to attain this goal: 1. combine soil, land use/land cover,and hydrologic information for each of 280 watersheds within the state using a GIS; 2. develop statistical output from the GIS for use in the sediment modeling phase of the project; and 3. develop a procedure to compare potential sediment yields for each watershed, by MLRA. This study is not intended to address the absolute observed sediment discharge from each watershed. Instead, a relative comparison of potential sediment yield, by watershed, serves to assess those watersheds that may contribute to the state's nonpoint source 2 pollution problem. Since, a sediment standard does not exist in South Carolina, a relative comparison of potential sediment yield between watersheds is assumed to be an acceptable procedure for identifying potential nonpoint source pollution contributors. LITERATURE REVIEW Erosion Mechanics The most prominent equation for predicting erosion (tons/acre) is the Universal Soil Loss Equation (USLE), A= RKLSCP . (1) These quantities will be discussed and defined individually. In 1917 the first erosion plot was established at the University of Missouri Agricultural Experiment Station. By 1943 a large volume of data had been collected and the studies were discontinued. The Musgrave equation was developed at a workshop in Cincinnati, Ohio in 1946. Based on plot studies, this equation related soil loss to slope, slope length, soil cover, conservation practice, rainfall energy and a measure of soil erodibility. Wischmeier and Smith (1965) improved the Musgrave equation and the result became known as the Universal Soil Loss Equation because it did not contain any geographic constraints. The rainfall factor R accounts for the interrelated erosive forces of rainfall and runoff, since the USLE is a lumped predictor of rill and inter-rill erosion. The best predictor of rainfall erosivity is a function of maximum 30-minute intensity (I30), conmmnly known as the El30 index, 3 E = 916 + 3311og0lo (2) where I = average intensity of the storm. The soil erodibility factor K, represents the susceptibility of a soil to erosion. Defined by Wischmeier and Smith (1965) as "the rate of soil erosion per unit of rainfall potential (index) from a unit plot which is tilled up and downslope, and has been kept in fallow for at least two consecutive years." Wischmeier et al. (1971) developed a nomograph which has become the established method of obtaining erodibility values. The following equation defines this nomograph: K = 2.1M1'4(10-6)(12-a) + .0325(b-2) + .025(c-3) (3) where H = (si + vfs), a = % organic matter, b = structure code, c = profile permeability class, si = % silt, vfs = % very fine sand. This is valid for A horizon soils with a silt fraction of less than 70%. Slope length factor is defined as the distance from the point of origin of overland flow until the point of slope decreases such that deposition occurs or until flow enters a defined channel. The follow- ing equation was developed for data on slopes of 3 to 20% and lengths of up to 400 feet; LS = (V/72.6)m[(430x2+30x+0.43)/6.613] (4) where 4 = slope length, x = sine of theta, 0 = slope angle. Exponent m is dependent on slope. This exponent is given by the following: slope < 3% m = .3 slope = 4% m = .4 slope > 5% m = .5 The SCS has developed a nomograph which has been extrapolated beyond these values. In practice these equations are useful. Irregu- lar slopes of non-uniform shape are sometimes encountered. In such cases modifications are necessary to the base equations as suggested by Wischneier. Barfield et al. (1980) illustrates this well. Howev- er, for this discussion complex slopes need not be considered. The CP factor accounts for the effects of canopy cover and management practice on erosion amounts. Originally the factors were proposed separately but are typically used as a single factor. Dissmeyer and Foster (1980) have tabulated C and P values for most surface conditions. Several subfactors are used to determine the final control practice factor for a given field situation. The USLE does not account for deposition. Therefore, erosion rates predicted by this equation could be larger than observed values if deposition occurs. Sediment is detached as either primary particles or as aggregates. Aggregates are transported as bedload, while primary particles may be transported as suspended load or as bed material. The delivery ratio concept can be incorporated to estimate 5 actual sediment yields. A ratio of sediment yield from a watershed and gross erosion from that watershed defines the delivery ratio as D = Y/A (5) where Y = sediment yield from a watershed, A = gross erosion from that watershed. Williams (1976) proposed modifying the USLE to account for transport phenomena. He suggested that the EI30 index be replaced by a runoff energy term. Procedures were developed for homogeneous watersheds using a lumped parameter approach and for nonhomogeneous watersheds using sediment routing procedures. The following equation was developed from 778 storms on watersheds near Riesel, Texas and Hastings, Nebraska: Y = 95(Qxqni)0 56K LS CP (6) where Y = single storm sediment yield in tons, Q = runoff volume in acre-ft, '9i = peak discharge in cfs, K = erodibility, LS = slope length factor, CP = control practice factors, QxcLi = runoff energy term, The USLE terms are weighted averages throughout the watershed for nonhomogeneous situations, Equation 6 is known as the Modified Universal Soil Loss Equation. Prediction accuracy of the MUSLE is shown in Figure 1. 6 2Sf 10 .~4. 10 ICO 4FCOQ la,=s CaSERVO -SE:DWOMTON~S) Figure 1. Prediiction Accuracy of the XIodified Universal Soil Loss Equation (Williams, 1975) a~~~~~~~~~ When considering nonhomogeneous watersheds, routing procedures are necessary. First, to account for watershed heterogeneity, the watershed is divided into homogeneous subwatersheds, and the travel time to the exit of the subwatershed is determined. Second, sediment yield for each homogeneous watershed is estimated by Equation 6. Third, the average diameter of sediment particles exiting each subwatershed is determined from an eroded particle size distribution. Finally, the amount of sediment from each watershed that reaches the exit is calculated by assuming that the rate of deposition is proportional to the particle size, sediment load, and travel time. The routing equation in differential form as Equation 7 can be integrated to obtain Equation 8, dYV/dt = -BYi(D50i) * (7) yi Yoie-ti (D50i) 5(8) (8) where Tti = travel time to main watershed exit, D50i = average diameter of sediment Yoi = yield at the subwatershed exit, Yi = sediment that reaches the main watershed exit. Then the total sediment yield from watershed i can be found from Equation 8. The routing coefficient B is found by trial and error from the following equation: 056 n 56 -BT 5 ~ (Qixqi) 56e- BTti(D50i).5. (9) (Q-XC) ws . 5 = i9 This procedure was verified by Williams using data from five storms on a 4380 acre watershed with a slope of two percent at Riesel, Texas. Results are shown in Table 1. 8 TABLE 1. Comparison of Routed and Measured Sediment Yields for Five Storms on Watershed G, Riesel, Texas (Williams 1975) Sediment Yield (tons) Delivery Routing Date Measured Routed Ratio Coefficient 3-29-65 4088 4448 46 6.1 2-9-66 1648 1533 42 8.7 5-10-65 759 848 44 4.9 8-12-66 1332 1067 46 4.4 5-10-65 1890 1470 45 6.4 Eroded Particle Size Distribution In order to use Equation 9, it is necessary to have a D50 value for the sediment exiting the subwatershed. This then becomes an jirportant parameter for deposition determination within the subwatershed. The eroded particle size distribution is needed. Methods have been proposed by Barfield et al. (1980), Rhoton et al. (1982), and Foster et al. (1985) for prediction of eroded particle size distribution. Barfield proposed that a rainfall event may be simulated on a sample of soil in question. This simulation is done using a Tee-jet 80150 nozzle with a 10 foot fall. Runoff from the sample is caught through a sieve stack grading from sand to coarse silt. The remaining suspended sediment is then analyzed for fine silt to clay size particles. This was done using a pipette analysis. This procedure has not been conpared with field measurements. Rhoton et al. (1982) proposed wetting the soil sample by one of two methods. In the first method the sample was allowed to soak for two hours in de-aerated distilled water. The second method was to wet the sample at 4 cm tension. This was done by putting the soil salmple on filter paper and placing it on a sponge saturated in an enclosed tray of distilled water. Each sample was allowed to equilibrate 9 overnight, then transferred to a 250 ml Erlenmeyer flask with dis- tilled water for a total volume of 125 ml. These soil suspensions were agitated on an orbital shaker for varying lengths of time at a constant rate of 250 rpm. Immediately after agitation, size distribu- tions were determined using procedures identical to those used in the field. The samples were wet sieved through a stack of 5 sieves with openings of 1000, 500, 250, 125, and 63 urn. Material <63 um. was transferred to graduated cylinders and separated into four additional sizes of 31, 16, 8, and 4 urn. This was done by pipetting after dispersion with hexametaphosphate. Rhoton et al (1982) found that variation increased as sediment size decreased. Seventeen different soil series were tested, all located in the delta and upland areas of northern Mississippi, except for three from Iowa (Clarion, Monona, and Tama). He found that this method of wetting had no significant effect on the prediction of size distribution. However, agitation times were significant in fitting the measured curves within one standard deviation. The best curve match required agitation times of five minutes (Memphis and Sharkey) to 45 minutes (Loring), with most soils falling in the 10 to 20 minute range. Rhoton concluded that an agitation time of 14 minutes is probably satisfactory for most soils. This would predict eroded size distribution within one standard deviation. Foster et al. (1985) proposed using equations that describe the composition of sediment as a function of primary particles in the matrix soil. The five particle classes used were primary clay, primary silt, small aggregate, large aggregate, and primary sand. Table 2 summarizes the equations for each classification and their size range. 10 TABLE 2. Revised Creams Equation Summary from Foster et al. (1985) by Barnhisel et al. (1983) Primary Clay Average Diameter: 0.002 mm Size Range: < .004 mm Specific Gravity: 2.65 Fraction of Primary Clay: Fcl = 0.26 0cl Primary Silt Size Range: .004-.063 mm Average Diameter: .10 mm Specific Gravity: 2.65 Fraction of Primary Silt: Fsi = Osi - Fsg Fine Aggregates Average Diameter: Dsg = .030 mm Ocl < .25 mm Dsg = 0.2(0cl - .25) + .03 .25 < .c6< *6 Dsg = .10 mm 0cl> .60 mm Specific Gravity: 1.8 Size Range: .004-.063 mm Fraction of Fine Aggregates: Fsg = 1.8 0cl 0cl < .25 mm Fsg = .45-.6(0cl-.25) Ocl> .5 mm Primary Sand Average Diameter: Dg = .30 mm Size Range: > .063 Specific Gravity: 2.65 Fraction of Primary Sand: Fsa = 0sa(1-Ocl) Coarse Aggregate Average Diameter: Dlg = .30 0cl < .15 mm Djg = 2.0 Ocl C > .15 mm Specific Gravity: 1.6 Size Range: > .063 mm Fraction of Large Aggregates: Flg = l-Fcl-Fs-fsg-Fsa Definitions: 0cl = Fraction of clay in parent material Osi = Fraction of silt in parent material Osa = Fraction of sand in parent material Fcl = Fraction of primary clay in eroded sediment Fsi = Fraction of primary silt in eroded sediment Fsa = Fraction of primary sand in eroded sediment F = Fraction of small aggregates in eroded sediment Fsg = Fraction of large aggregates in eroded sediment 11 These equations were tested on 28 different soils. A one-tailed t-test yielded significant difference at the 1% level indicating that these equations predict measured particle sizes better than the original Creams equations. Erosion Modelina A model is often defined as a mathematical representation of a phenomenon or process. An environmental model is a set of mathematical rules that attempts to describe quantitatively the behavior of and interactions among a group of variables. TWo types of models are usually recognized. They are lumped parameter models and distributed parameter models. Lumped parameter models attempt to evaluate spatially variable parameters by calculating effective values for an entire area. The influences of spatial nonuniformities are condensed into mathematically equivalent point coefficient values. Lumped parameter models reduce the computational requirements and usually try to minimize lost simulation accuracy. Distributed parameter models incorporate data on the aerial distribution of parameter variations with computational algorithms to evaluate these influences. These types of models increase simulation accuracy and required computational inputs. Modern computers make the distributed models desirable. Relative advantages of distributed models over lumped models depend on the application. However, when modeling runoff and sediment concentrations it is believed that distributed parameter models offer significant advantages. Distributed models, for example, can evaluate the significance of degrees of lumrping. It is not possible to use a lumped model to do this. 12 Somne prominent watershed models available are TVA HYSIM (lumped) (Betson et al. 1980), TENN-1 (lumped) (Overton and Crosby 1979), ANSWERS (distributed) (Beasley et al. 1980), FESHM (distributed) (Wolfe et al. 1979), SEDIMOT II (distributed) (Warner et al. 1982). HYSIM is a continuous simulation lumped parameter model. ANSWERS, FESHM and SEDIMOT II are event distributed parameter simulation models. SEDIDMOT II was chosen for modeling work in this study because its input requirements can be readily determined from a topographic map and field data survey. SEDIMCOT II is built in four major areas: (1) rainfall component, (2) runoff component, (3) sediment component, and (4) sediment control component. The rainfall component allows a design event or a measured storm to be used. Design event rainfall depths are taken from the SCS type I or II curves. Input storms require accumulated time and depth values and the maximum 30 minute intensity. For simulation purposes the watershed is divided into a sequence of junctions, branches, and structures as shown in Figure 2. Above each structure the subbasin is divided into subwatersheds of uniform land use. Runoff component input parameters are found for each subarea. Inputs required are drainage area, curve number, time of concentration, travel time, Muskingams routing coefficients, and unit hydrograph type (disturbed, agricultural, forested). This component has been evaluated using published rainfall-runoff data from eight watersheds with a total of 27 storms. Figure 3 shows the fit of predicted verses observed values. The hydraulic component worked well on the tested watersheds. Two different subroutines can be used within the sediment compon- 13 '~~~~~~1 ' - ' 3 ~~~~~~~~~~~~~~AV-FIAGE SLOPE 301% CYsITMXI INTERVAL 20 faet 250 0 230 BW~ I/1= -(7TRUCTIJR. 4 HA ~~~~~~ AltCTIVE /14N M OLW17L ~~I;~5C~3~ :.��~�J(,7..- /r-,,1,no.~ ... . ~~~) I\// ,147 I/1~ /f- // Q%~~~~~~FIUCTU~~~~IIIL STIlLJCTURE 3: 'N ) I� ~ ~~~~~~~~~STI'IUIC'rUItE: 2 "L^ RECLAMAT ION PVASE M IUDDING PI,]ASE UNCTION 2 r\ a ~ J �srnucr nE\ 7, I, Fil Figure 2. Example Watershed Division for SEDIMOT II Simulation (SEDINOT Design Manual, 1982) ALL WATERSHEDM rz0.8? 600L 500~~~~~~~~~~~~~~~ zoo- 200~~~~~~~~~ 100 ~ ~ 0 100 -0 2C 010 0 CSSERVE0 DIS0-iARAGE-- o1: Figure 3.Prediction Accuracy of Hydraulic Component (SEDIMOT Design Manual, 1982) 15 ent to calculate sediment yield. The MUSLE discussed in the previous section is used in the MUSLE subroutine. This subroutine will be used to calculate sediment yield. Inputs for this component are specific gravity of eroded sediment, bulk specific gravity of settleable mass, load rate coefficient, and eroded particle size-percent finer distribution. Soil erodibility, slope length, slope, and control practice factors were determined for each subwatershed. Determination of these factors was discussed in the previous section. S ECA is similar to SEDIMOT II. The main difference is that SEDCAD+ has computer-aided design features. Four datasets were collected for inclusion in the statewide geographic analysis of South Carolina. The information system includ- ed watershed boundaries, general soil groups, hydrology (streams and reservoirs), and land use/land cover categories. These datasets were obtained from various sources on different types of media at different mapping scales. Data Sets Watershed Boundaries - Watershed boundaries were digitized from a single 1:500,000 scale Hydrologic Unit Map of South Carolina. This map was compiled by the USDA Soil Conservation Service in 1970 (re- vised in 1981) on a basemap prepared by the U.S. Geological Survey. Each of the 280 watershed units identified on the map were digitized and stored in the computer. General Soil GrouDs - General soil groups were digitized from ten 1:250,000 scale sheets showing the draft mapping unit delineations for the updated General Soil Map of South Carolina (SCS 1988). Each 16 of the 160 general soil groups contained information about the predom- inant soil series found within each general soil group. The informa- tion used to characterize each soil series included erodibility, slope gradient, hydrologic soil group, particle size distribution (texture), capability class, flooding frequency-where applicable, and percent of each mapping unit in terms of acreage. These statistics were used to characterize the physical properties of the soil found within each watershed. Hydroloy - Hydrologic data (streams and reservoirs) were digi- tized from the Hydrologic Unit Map. Stream lengths were determined for each Watershed Unit on a Cataloging Unit basis for subsequent input into the SEDCAD+ modelling procedure. land Use/Land Cover - Land use/land cover information was incor- porated into the GIS by importing a digital file which contained U.S. Geological Survey-air photo interpreted land use/land cover data, dated 1977. Although the dataset was over 10 years old, it contained the most current available land use/land cover information for the entire state. Table 3 shows the eight categories of land use/land cover identified. Maior Land Resource Areas - Six Major Land Resource Areas (MLRA) have been identified in South Carolina (SCS 1980). The MLRA's contain geographically associated land resource units which have been identi- fied, from northwesterly to southeasterly: Blue Ridge, Southern Piedmont, Carolina and Georgia Sand Hills, Southern Coastal Plain, Atlantic Coast Flatwoods, and Tidewater Area. The final result of the study compares the potential sediment yield of all watersheds by MLRA. 17 Construction of the Geocranhical Information System Once data entry was achieved, either by manual digitizing digital file importation, each dataset was converted to a gridded format. The computer files containing mapped information were divided into 2205 columns by 1759 rows of grid cells, each measuring 200 meters by 200 meters. The layers of data were thus prepared for overlay analysis. Due to differences in the scales and formats of map sources, the data layers were adjusted to register with one another in their correct planimetric position on the earth's surface. Data analysis was accomplished by extracting the soil group and land use/land cover data for each of the 280 watersheds and digitally overlaying them to produce acreage and percent-area amounts of land use/land cover within each soil map unit. Sediment Yield Projections Output from the GIS was used to develop a land use/soils overlay, and information generated from these combined datasets were used in a LOUS 123 spreadsheet to calculate lumped parameters, by watershed, for modeling sediment yield. The lumped parameters derived from the GIS data were: 1. area of watershed (acres) 2. curve number 3. time of concentration 4. slope gradient 5. eroded particle size distribution 6. erodibility 7. maximum length to slope break 8. control practice factor Several factors were held constant irregardless of watershed location. These factors are listed in Table 3. 18 TABLE 3. Constants used in the statewide sediment yield model for calculating lumped parameters. HSG and SCS Control Hydrographic Land Use Land Use Curve Number Practice Response Class Description A B C D CP 1 Urban 70 80 86 89 .03 Fast 2 Agricultural 54 70 79 84 .9 Med. 3 Rangeland 54 70 79 84 .037 Med. 4 Forest 35 65 74 83 .003 Med. 5 Water 100 100 100 100 0 Fast 6 Forested 100 100 100 100 .0001 Slow Wetlands 7 Non Forested 100 100 100 100 .0001 Slow Wetlands 8 Bare 72 82 87 89 1.2 Med. The constants listed in Table 3 were used in the following equations to calculate lumped parameters, by watershed. CN (Curve Number)=",.A pi t (Time of Concentration = L'8 [((1000/CN)-10)+1]-7/1140(S)-5 c L = Maximum Length of Flow S (Slope) =- si Ai K (Erodibility) = XKiAi E Ai CP (Control Practice)= CPiAi Ai The area weighting technique, using the equations listed above, was utilized throughout the analysis. For example, to develop general soil information for individual mapping unit, each soil series within the mapping unit was proportionately weighted by acreage and averaged to obtain statistics for the entire mapping unit. Next, the watershed 19 boundary were overlain onto the soil mapping unit, and land use was combined with the watershed/soil dataset. Each watershed's combined data were extracted from the new composite statewide database for input into the mathematical model. The equation listed above were used to develop lumped parameters, by watershed, for use in the SEDCAD+ sediment yield model. In addition, the eroded particle size distributions were determined from the revised Creams equations. The SEDCAD+ simulation procedure was followed using the lumped parameters generated for each watershed. In many cases, the time of concentration was modified to a maximum acceptable value if the calculated value exceeded the maximum. In the SEDCAD+ program, six hours is the maximum value for complete unit hydrograph evaluation. Since the time of concentration exceeded six hours for most watersheds, the outflow hydrograph does not simulate observed conditions. Therefore, a comparative analysis by watershed is the appropriate means for evaluating derived sediment yields among watersheds within the same MLRA. The output values used for comparative purposes were sediment yield in terms of tons per square mile and, for reference, concentration of sediment in terms of milligrams per liter. To generate these final statistics, a predetermined storm event was held constant for each watershed. A 2-year 24-hour storm was selected as the designed storm event. This event was selected because it has been reported in the literature that natural stream channels are stable and would not significantly contribute to sediment yield during a storm event of this magnitude (Wolman et. al, 1960; Baker, 20 1977). For South Carolina, precipitation for 2-year 24-hour storm ranges from five inches in the upper part of the state and along the coast, to three and one-half inches in the northeastern part of the state. Abandoned iLan In 1978 and 1979, the SCLRCC, within its Division of Mining and Reclamation, conducted a statewide inventory of abandoned mine lands. The inventory served to compile information on abandoned mine lands by county, including the number of mines, the location of each mine, descriptions of the physical characteristics of each site, and esti- mates of the severity of problems emanating from such lands. Other qualitative characteristics noted for each site included the commodity mined, surrounding land use, public safety hazard, nature of the terrain, condition of perimeter slopes, amount of groundcover, reclamation requirements, and water area. Waterbodies comprised 21% of the total area of abandoned mine lands; however, no quantitative descriptions of water quality were included. RESULTS AND DISCUSSION GeocraDhical Database Graphic output was produced to check various elements of the analysis and to describe the GIS construction and overlay process. Figure 4 shows the streams, reservoirs, and the 280 watersheds. Figure 5 shows the 160 general soil groups for South Carolina. Figure 6 shows the eight land use/land cover categories for the state. Figure 7 shows a sample watershed (*20) with hydrologic features. 21 F I CLRE 4 - .... RESERVOIRS AHD STREAtMS -<I -K~~~~~~~~' BouNDARY W ATER K~ " �' 1 / '1.., -.. .. ,~~~~~ , "". ~" ' 7' S C LAND RESOURCES COMMISSION / ' FI GURE G ;EGE F.ER'AL SO IL A.SSOC IAT IONS BY WATERSHED 160 SOIL ASSOCIATIONS SC Li-dID PESCILIRCES COMMrISSIO~N FIGURE 6 ......Ago..... LAND USE/LAND COVER y sy~~~~~~~~~~~B WATERSHED I URBAN� NA13PICULTIPAL I RANGELANID FIFOREST IIWATER FORESTED WETLtNDS I N,,NFOIFEJTEE WETLNE'DS BARRE1L F ~~~~~~~~~~~~~~~~~~~~~~ :LIDEO.PE il�I1SW ho( FIGURE 7. S.C. WATERSHED #2Z STREAMS AND / RESERVOIRS C~Iii - WATER - WATERSHED BOUNDARY SCLRCC FIGLURE ~ &8. I SOIL MAP S.C. ASS'N UNIT# WATERSHED I CECIL SCool #20 HIWASSEE GENERAi WILKES SO I L I, 9 1 m CECIL SCOo2 MAP HIWASSEE I IREDELL SC003 ARMENIA _ CECIL SCO04 CATAULA APPLING I CECIL S0085 HIWASSEE MECKLENBURG I MADISON SC006 DAUIDSON PACOLET I CATAULA SC009 CECIL WILKES I WILKES SCO1l .! EENON ] WATER I CATAULA SC0ll ENON SCLRCC WSEE HIWASSEE FIGURE 9. 1 S.C. WATERSHED #20 LAND USE/LAND COVER I URBAN ! AGRICULTURAL I FOREST J WATER I FORESTED WETLANDS = BARREN SCLRCC 2- Figures 8 and 9 show the soil map units and land use/land cover types for Watershed 20, respectively. The information shown in Figures 7 through 9 were generated for all 280 watersheds identified in the study. Statistical output from the combination of these datasets was manipulated in a LOTUS 123 database management system and passed to the SEDCAD+ program. Sediment Yiel Predictions A weighted average of yield in tons per square mile was deter- mined for each watershed by the SCAD+ program. All 280 watersheds were grouped by MLPA so that the calculated sediment yields could be compared within similar physiographic regions of the state. The calculated sediment yield value was compared to one weighted average, two times the weighted average, and three times the weighted average for each watershed within the six MLRA's. Watersheds that had values equal to or greater than these weighted averages were identified, and are shown in Table 4. A total of 134 watersheds were identified, with 117 greater than or equal to one weighted average, 15 greater than or equal to two times the weighted average, and 2 greater than or equal to three times the weighted average. Taking into account the limitations of this analysis, the 134 watersheds identified are assumed to be "potential- ly" nonpoint source polluted by sediment. Abandoned Mine Land The survey identified a total of 14,218 acres of abandoned mine lands, 6,033 acres of which had not been reclaimed. Of the total acres of abandoned mine land, 3,948.8 acres were identified as having moderate to severe off-site sedimentation and/or surface conditions 28 TABLE 4 Weighted Average Comparison by Watersheds :&P-A TONS/. WSH # MLRA CAT # UNIT# (SQ MI) SQ MI >WA >2WA >3WA 32 153A 3060106 140 108.93 337 33 153A 3060109 20 148.61 385 34 153A 3060109 50 124.70 320 36 153A 3050208 50 138.82 463 36 37 153A 3050208 60 80.34 818 37 38 153A 3050208 80 113.61 472 38 39 153A 3050208 120 90.26 509 39 47 153A 3050208 20 160.98 410 48 153A 3050208 30 152.02 357 49 153A 3050208 70 103.74 416 53 153A 3050207 50 152.01 809 53 54 153A 3050207 40 167.05 >07 54 57 153A 3050207 100 54.16 475 57 58 153A 3050207 80 67.45 552 58 59 153A 3050207 90 80.33 340 60 153A 3050207 110 73.95 549 60 75 153A 3050203 80 91.93 580 75 76 153A 3050205 10 143.76 287 77 153A 3050205 20 57.25 502 77 78 153A 3050205 30 68.20 181 79 153A 3050205 40 159.90 395 80 153A 3050205 50 22.16 74 84 153A 3050206 20 107.91 573 84 85 153A 3050206 30 79.43 450 85 86 153A 3050206 40 102.49 411 87 153A 3050206 50 31.68 542 87 88 153A 3050206 55 21.51 476 88 89 153A 3050206 60 110.97 355 90 153A 3050206 70 142.93 385 91 153A 3050202 10 140.68 255 92 153A 3050202 20 96.81 502 92 93 153A 3050202 30 36.45 180 98 153A 3050201 10 61.41 328 99 153A 3050201 20 113.35 237 100 153A 3050201 30 67.73 205 103 153A 3050201 60 79.09 155 195 153A 3050112 10 177.94 391 196 153A 3050112 20 54.29 580 196 212 153A 3040202 97 16.31 551 212 213 153A 3040202 100 173.84 688 213 214 153A 3040202 110 62.30 451 214 215 153A 3040202 140 24.93 460 215 216 153A 3040202 150 56.13 489 216 217 153A 3040202 120 162.32 447 218 153A 3040202 160 53.95 397 219 153A 3040202 170 51.17 372 220 153A 3040202 130 63.40 382 224 153A 3040205 20 14.95 416 229 153A 3040205 70 130.10 420 230 153A 3040205 110 188.63 460 230 231 153A 3040205 100 38.61 330 232 153A 3040205 120 63.25 402 233 153A 3040205 130 78.30 425 (WA = 1 weighted average in tons/sq.mi.) (2WA = 2 weighted average in tons/sq.mi.) (2WA = 3 weighted average in tons/sq.mi.) TABLE 4 AREA TONS/ WSH # MLRA CAT # UNIT# (SQ MI) SQ MI >WA >2WA '>3WA 234 153A 3040205 140 232.53 481 234 235 153A 3040205 160 132.11 487 235 236 153A 3040205 150 182.94 273 237 153A 3040205 170 130.89 328 256 153A 3040201 150 168.53 637 256 257 153A 3040201 140 98.83 361 258 153A 3040201 160 160.92 458 258 261 153A 3040204 50 167.14 827 261 262 153A 3040204 38 8.19 727 262 266 153A 3040204 70 323.19 438 267 153A 3040204 90 78.47 463 267 268 153A 3040204 80 163.25 495 268 269 153A 3040204 88 45.38 431 271 153A 3040203 220 79.39 426 272 153A 3040206 66 13.55 329 273 153A 3040206 100 36.11 375 274 153A 3040206 110 51.14 481 274 275 153A 3040206 120 132.14 536 275 276 153A 3040206 91 55.40 316 35 153B 3060109 60 56.37 97 40 153B 3050208 130 145.92 213 40 41 153B 3050208 140 44.02 108 42 153B 3050208 110 91.80 125 43 153B 3050208 90 339.73 397 43 44 153B 3050208 100 196.16 277 44 45 153B 3050208 10 323.44 306 45 46 153B 3050208 40 81.04 153 81 153B 3050205 60 222.88 191 82 153B 3050205 70 149.95 391 82 94 153B 3050202 40 65.15 135 95 153B 3050202 50 224.89 267 95 96 153B 3050202 60 135.93 72 97 153B 3050202 70 82.34 356 97 101 153B 3050201 40 163.45 50 102 153B 3050201 50 69.07 119 104 153B 3050201 70 59.94 79 105 153B 3050201 80 94.48 164 197 153B 3050112 30 260.74 167 198 153B 3050112 40 71.76 269 198 199 153B 3050112 50 81.86 51 200 153B 3050112 60 94.97 194 238 153B 3040205 180 133.64 135 239 153B 3040207 40 165.89 139 240 153B 3040207 50 71.28 47 241 153B 3040207 30 44.99 193 259 153B 3040201 170 117.10 155 277 153B 3040206 130 110.49 123 278 153B 3040206 140 160.36 167 279 153B 3040206 150 58.33 49 1 130 3060102 30 24.88 12,909 1 2 130 3060102 60 91.91 8,999 2 30 TABLE 4 AREA TONS/ WSH # MLRA CAT # UNIT# (SQ MI) SQ MI >WA >2WA >3WA 3 130 3060102 120 111.09 3,311 6 130 3060101 20 48.82 532 10 130 3060101 30 106.06 5,640 10 106 130 3050109 10 71.74 8,104 106 107 130 3050109 20 134.43 6,030 107 108 130 3050109 30 45.52 653 50 133 3050207 10 80.84 856 50 51 133 3050207 20 25.90 1,299 51 55 133 3050207 60 114.28 1,111 55 63 133 3050204 30 122.37 836 63 65 133 3050204 60 40.87 1415 65 66 133 3050204 70 36.94 879 66 67 133 3050204 50 267.70 1,156 67 73 133 3050203 60 89.12 663 74 133 3050203 70 79.37 481 83 133 3050206 10 84.53 764 83 186 133 3050110 50 101.56 494 187 133 3050110 60 57.05 568 188 133 3050110 70 73.62 549 189 133 3050111 10 191.51 530 190 133 3050111 20 93.41 726 190 191 133 3050111 29 14.93 757 191 192 133 3050111 30 45.42 723 192 193 133 3050111 40 30.98 557 194 133 3050111 50 47.15 389 211 133 3040202 90 179.90 697 211 223 133 3040205 10 93.76 807 223 225 133 3040205 60 93.15 908 225 226 133 3040205 50 45.13 646 227 133 3040205 80 154.17 447 228 133 3040205 90 272.80 511 245 133 3040201 33- 25.62 958 245 246 133 3040201 29 6.72 811 246 247 133 3040201 19- 9.13 558 248 133 3040201 41- 28.11 354 249 133 3040201 50 362.28 533 250 133 3040201 72 68.68 830 250 251 133 3040201 97 10.58 557 252 133 3040201 90 114.20 761 252 254 133 3040201 130 227.24 490 255 133 3040201 120- 141.58 441 260 133 3040204 15 39.95 678 263 133 3040204 30 138.97 746 263 264 133 3040204 49 2.49 599 265 133 3040204 60 20.26 863 265 270 133 3040203 215 53.82 655 280 133 3040204 29 0.48 782 280 4 136 3060102 130 60.88 7,411 4 5 136 3060102 150 49.30 8,755 5 7 136 3060101 50 147.22 4,825 7 8 136 3060101 80 96.31 7,405 8 31 TABLE 4 AREA TONS/ WSH # MLRA CAT # UNIT# (SQ MI) SQ MI >WA >2WA >3WA 9 136 3060101 40 173.94 7,312 9 11 136 3060101 70 48.30 2,135 12 136 3060101 60 117.70 7,392 12 13 136 3060101 90 68.13 4,493 13 14 136 3060101 100 78.33 6,088 14 15 136 3060103 20 13.58 11,773 15 16 136 3060103 30 193.44 4,403 16 17 136 3060103 80 43.34 4,162 17 18 136 3060103 70 201.30 4,888 18 19 136 3060103 100 112.96 692 20 136 3060103 140 334.41 3,282 21 136 3060103 150 238.60 1,583 22 136 3060107 10 253.37 1,132 23 136 3060107 20 234.63 1,569 24 136 3060107 30 42.89 975 25 136 3060107 40 225.12 498 26 136 3060106 30 41.96 408 109 136 3050109 40 131.91 5,140 109 110 136 3050109 50 33.35 6,573 110 111 136 3050109 60 40.08 5,213 111 112 136 3050109 70 17.58 4,383 112 113 136 3050109 80 254.14 3,971 113 114 136 3050109 90 44.13 5,286 114 115 136 3050109 100 115.14 2,616 116 136 3050109 110 38.43 7,514 116 117 136 3050109 120 88.51 6,148 117 118 136 3050109 130 139.85 5,355 118 119 136 3050109 140 156.78 1,966 120 136 3050109 150 260.75 3,718 120 121 136 3050109 160 125.16 3.844 121 122 136 3050109 163 113.61 3,484 123 136 3050109 170 232.49 4,320 123 124 136 3050109 180 106.37 1,848 125 136 3050109 190 167.39 2,715 126 136 3050109 200 21.25 951 127 136 3050109 210 95.60 939 128 136 3050108 10 266.71 5,683 128 129 136 3050108 20 113.09 2,149 130 136 3050108 30 54.89 5,977 130 131 136 3050108 40 106.92 3,583 132 136 3050108 43 38.44 1,477 133 136 3050108 50 187.45 2,091 134 136 3050107 10 179.10 4,161 134 135 136 3050107 20 40.87 3,986 135 136 136 3050107 30 41.45 2,596 137 136 3050107 40 102.35 5,745 137 138 136 3050107 50 239.64 3,806 138 139 136 3050107 60 243.99 3,991 139 140 136 3050105 155 47.83 7,554 140 141 136 3050105 160 88.07 7,545 141 142 136 3050105 180 93.63 5,514 142 143 136 3050105 170 132.21 8,715 143 144 136 3050105 58 9.50 11,002 144 32 TABLE 4 AREA TONS/ WSH # MLRA CAT # UNIT# (SQ MI) SQ MI >WA >2WA >3WA 145 136 3050105 94 143.08 5,946 145 146 136 3050105 110 23.09 5,752 146 147 136 3050105 130 154.77 7,643 147 148 136 3050105 109 23.77 4,147 148 149 136 3050105 122 41.70 1,338 150 136 3050105 142 120.76 7,933 150 151 136 3050105 190 126.18 4,961 151 152 136 3050101 190 64.80 3,694 152 153 136 3050101 200 61.62 4,434 153 154 136 3050106 10 122.60 3,483 155 136 3050106 20 152.45 5,733 155 156 136 3050106 30 54.95 2-,726 157 136 3050106 40 160.79 2,547 158 136 3050106 50 224.29 2,621 159 136 3050106 60 247.61 1,022 160 136 3050106 70 188.16 1,298 161 136 3050106 80 61.38 1,892 162 136 3050106 90 96.47 872 163 136 3050103 10 148.70 1,151 164 136 3050103 28 43.83 1,788 165 136 3050103 38 35.35 2,164 166 136 3050103 50 42.84 2,658 167 136 3050103 60 219.68 3,834 167 168 136 3050103 70 24.50 3,276 169 136 3050103 90 217.49 4,021 169 170 136 3050103 42 201.23 3,124 171 136 3050103 80 35.06 999 172 136 3050104 10 262.11 2,289 173 136 3050104 20 60.56 3,823 173 175 136 3050104 40 70.49 1,180 176 136 3050104 50 61.38 1,159 201 136 3040105 80 2.81 10,653 201 202 136 3040104 60 7.04 5,593 202 203 136 3040202 15 27.77 4,507 203 204 136 3040202 20 15.60 4,644 204 205 136 3040202 50 47.77 1,416 206 136 3040202 30 59.55 2,281 207 136 3040202 40 47.51 689 208 136 3040202 70 124.76 848 27 137 3060106 50 158.37 205 28 137 3060106 60 187.25 830 28 29 137 3060106 100 220.89 494 30 137 3060106 110 135.19 99 31 137 3060106 130 169.10 309 52 137 3050207 30 18.17 996 52 56 137 3050207 70 60.59 705 61 137 3050204 20 150.06 1,013 61 62 137 3050204 10 221.82 943 62 64 137 3050204 40 63.12 1,243 64 68 137 3050203 10 84.96 552 69 137 3050203 30 64.65 384 70 137 3050203 20 98.81 343 33 TABLE 4 AREA TONS/ WSH # MLRA CAT # UNIT# (SQ MI) SQ MI >WA >2WA >3WA 71 137 3050203 40 191.16 1,093 71 ' 72 137 3050203 50 86.15 1,206 72 174 137 3050104 30 362.62 546 177 137 3050104 60 124.42 623 178 137 3050104 70 67.72 288 179 137 3050104 80 67.69 1,650 179 180 137 3050104 90 79.38 128 181 137 3050104 100 74.72 194 182 137 3050110 10 218.15 229 183 137 3050110 20 157.32 296 184 137 3050110 30 72.54 379 185 137 3050110 40 52.08 339 209 137 3040202 60 193.10 808 209 210 137 3040202 80 80.17 261 221 137 3040205 30 112.42 1,502 221 222 137 3040205 40 20.54 871 222 242 137 3040201 62 288.89 1,944 242 243 137 3040201 100 172.86 1,040 243 244 137 3040201 80 76.98 742 244 253 137 3040201 110 322.98 757 253 34 that would require major efforts for reclamation. The identification of sites having major reclamation needs was based on several factors that indicate the potential for surface or groundwater impact, includ- ing severe erosion, sloughing highwalls, lack of vegetation, or potentially poor water quality. Acreages of these sites are identi- fied on a watershed basis in Table S. The abandoned mine lands inventory is a useful tool for site identification and for determining the reclamation needs of these areas. The study, however, is now ten years old and the condition of many of these sites may have iirproved or deteriorated through time. Additional site-specific information is required to accomplish a more accurate assessment of nonpoint pollution. Furthermore, information on soils,, slope steepness,, and slope length is not presently available for mined areas. Therefore,, general information obtained from exist- ing datasets can not be used to predict soil loss from these sites. Hydrologic data should be collected for these areas, including water quality inventory for surface waters within and adjacent to the mine site. Potential sources of acid or toxic forming materials should also be identified. 35 TABLE 5. Watersheds containing abandoned mine lands that may contribute to nonpoint source pollution. ABANDONED MINE LAND Acreage with Other Acreage Moderate or Severe with Major Watershed No. Off-site Sedimentation Reclamation Needs 4 7.2 8 25.0 10 10.4 11 42.0 12 6.5 16 1.3 19 2.0 22 0.5 23 1.3 24 10.0 26 11.0 1.3 27 32.5 264.0 28 7.2 15.3 29 1.3 30 0.3 31 6.0 2.3 36 3.7 37 16.5 38 1.8 39 3.6 42 13.5 43 2.5 47 105.0 49 10.0 50 1.1 51 8.3 52 1.6 53 1.7 55 0.4 56 14.5 60 2.0 61 10.9 62 2.5 112.3 64 0.9 67 8.0 68 20.5 9.0 69 2.5 70 11.1 72 12.3 3.8 74 6.0 79 30.0 81 8.1 4.0 84 20.0 86 181.0 36 Table 5 (con't.) Acreage with Other Acreage Moderate or Severe with Major Watershed No. Off-site Sedimentation Reclamation Needs 87 70.0 90 20.5 91 2.0 92 757.0 93 75.0 94 3.6 95 18.0 97 17.0 106 3.8 107 3.0 109 9.0 115 5.0 118 1.0 119 11.5 120 1.3 122 3.0 123 12.2 127 5.0 128 7.8 129 67.5 8.5 131 6.0 133 7.0 134 11.3 135 1.4 136 0.6 137 2.3 138 2.8 5.2 139 21.5 140 3.6 142 5.2 143 6.4 147 0.3 2.0 148 5.0 149 42.2 6.1 150 8.6 151 2.0 152 45.0 154 0.5 0.2 157 10.2 158 7.2 7.7 159 71.0 160 3.2 7.5 161 2.5 162 1.4 163 2.0 164 3.5 165 4.3 3.6 37 Table 5. (con't.) Acreage with Other Acreage Moderate or Severe with Major Watershed No. Off-site Sedimentation Reclamation Needs 169 3.2 170 4.6 171 2.5 172 4.3 8.3 174 3.5 80.5 176 4.3 177 20.0 178 1.4 10.6 179 237.5 180 5.7 7.2 181 6.6 182 1.4 183 18.1 81.5 188 8.0 189 45.1 198 2.0 199 4.0 204 2.0 206 2.8 0.8 208 8.5 209 2.8 210 0.5 3.0 211 1.5 3.5 221 3.9 0.7 223 2.0 227 9.5 228 18.0 230 53.4 232 11.0 19.5 241 17.2 242 10.9 2.0 243 0.9 56.1 244 2.1 4.8 245 0.2 248 75.0 2.2 249 18.6 144.4 250 75.0 113.0 252 19.5 253 20.1 1.6 254 12.0 13.5 255 4.0 257 4.0 259 8.0 263 7.5 3.0 271 138.0 277 TOTAL 920.8 3028.0 38 APPENDIX A SEDIMENT YIELD BY WEIGHTED AVERAGE 39 WS0 I MLRA 000 SLOPE CAT I 0N0T6 TONS MOIL AREA fACRES) AREA fSO MI) TONSISO MI AVA 02M6 >3W6 32 1536 1.9 3060106 140 36.729 1.611 69.716 108.93 337 33 1536 1.3 3060109 20 57,207 2.460 95.109 140.60 305 34 153A 1.2 3060109 50 39,050 1,080 19.000 124.70 320 36 153A 1.4 3050208 50 64,207 3,209 00,042 130.02 463 36 37 1 53A 1.4 3050200 60 65,746 4.830 51,419 00.34 010s 37 30 153A 1.3 3050200 00 53,650 2,790 72,711 113.61 472 30 39 1536 1.2 3050300 120 45,943 2.576 57,765 90.26 509 39 47 153A 1.3 3050208 20 65,949 2.420 1 03.027 160.90 410 48 153A 0.1 3050200 30 54.327 1.000 97.294 152.02 357 49 153A 1 .2 305020B 70 43.054 2.513 66.394 103.74 416 53 1536 1.4 3050207 so 122,934 5,211 97,284 152.01 009 53 54 1534 1.5 1050207 40 001,333 Z.504 1 06.911 167.05 607 54 57 153A 1.3 3050207 000 25,700 2.994 34.665 54.16 475 57 50 153A 1.5 3050207 00 37,256 3.267 43.166 67.45 552 50 59 153A 1.2 3050207 90 27,335 2,195 51.410 00.33 340 60 153A 1.3 3050207 Ito 40.602 2,969 47,327 73.95 549 60 75 1536 2. 3050203 so 53.291, 3.935 50.033 91.93 500 75 76 1536 1.4 3050205 ID 41.193 1.023 92.005 143.76 207 77 153A 1.4 3050205 20 20,746 3.054 36,642 57.25 502 77 70 153A 1.2 3050205 30 122.312 1.201 43,650 60.20 101 79 1536 1.5 30502205 40 63.226 3.034 102.334 159.90 395 so 153A 1.1 3050205 So 1.632 479 14.104 22.16 74 04 1536 1.5 3050206 20 61.067 4,230 69.063 107.91 573 84 -IS 05 153A 1.4 3050206 30 35.766 3.309 50.036 79.43 450 05 a 0 153A 1.4 3050206 40 4-1.119 2.791 65.594 1021.49 411 87 153A 1.4 3050206 50 17,158 4,330 20.273 31.60 542 07 00 153A 1.5 3050206 55 10.236 4,340 13.769 21.51 476 Be 09 153A 1.3 3050206 60 39,445 2,509 71,020 110.97 355 90 153A 1.2 3050206 70 55.065 21.600 91,472 142.93 305 91 153A 0.1 3050202 10 35,923 1.349 90.030 040.60 255 92 153A 1.4 3050202 2 0 48.501 2,893 61,956 96.01 502 92 93 1536 1.4 3050202 30 6.565 994 23.327 36.45 100 90 153A 1.2 3050201 to 20.157 1.626 39.300 6 1.41 328 99 153A 1.0 3050201 20 26,914 1,103 72,543 1 13.35 237 100 1536 1.1 MOM20 30 13.916 1,010 43.344 67.73 205 103 153A 1.1 3050701 60 12,262 736 50.619 79.09 055 195 1536 1.4 3050112 10 6 9.567 2,379 113.000 177.94 391 190 1530 1.4 3050112 20 31.406 3.440 34.744 54.29 5010 196 212 153A 1.6 3040202 97 0,907 4.832 10.438 16.30 551 212 213 1536 1.6 3040202 100 119.551 5.769 101,260 173.04 600 213 214 1536 1.4 3040202 110 20,098 3,786 39,074 62.30 451 214 215 1 53A 1.4 3040202 140 11.465 3,344 15.954 24.93 460 215 216 1536 1.4 3040203 150 23.446 3.403 35.920 56.13 409 216 217 1536 1.3 3040202 1 20 72,481 3.313 103,006 162.32 447 210 1536 1.3 3040202 160 21,435 2.030 34,527 53.95 397 219 153A 1.1 3040202 170 1 9,036 2,.761 32,748 51.17 372 220 1536 1.6 3040202 130 24,246 2.934 40,576 63.40 302 224 156 1.6 3049205 20 6,210 3.342 9,560 14.95 416 229 153A 0.5 3040205 70 54.670 3,110 03.267 130.00 420 230 153A 1.5 3040205 110 8 6.700 3,479 120.720 100.63 460 230 21 153A 1.4 30402105 100 02,741 21.2141 24.711 30.61 330 232 153A 1.3 3040205 120 225,433 2,731 40,477 63.25 402 33 1536 1.4 3040205 130 33.300 3,075 5015 70.30 425 234 0536 1 .4 3040205 140 101,062 3.478 140.822 232.53 401 234 NSH 4 HLRA AV6 SLOPE CAT I UNITI TONS 6OIL AREA (ACRES) AREA (SO HI) TONSISO HI )NR )2NA M3NA 235 153A 1.3 3040205 160 64.394 3,309 84,.552 132.11 4087 235 236 153A 1.2 3040205 150 49,977 1,738 117,082 182.94 273 237 153A 1.2 3040205 170 42.,B0 1,936 83,771 130.89 328 256 153A 1.7 3040201 5IO 107,306 4.601 107,860 168.53 637 25t 257 153A 1.7 3040201 140 35,662 2,399 63,251 98.83 361 258 153A 1.3 3040201 160 73,671 2,531 102,987 160.92 458 250 261 153A l.5 3040204 50 138,196 5,883 106,970 167.14 027 261 262 153A 1.3 3040204 38 5,953 5,066 5,239 8.19 727 262 266 153A 1.3 3040204 70 141,663 2,727 206.844 323.19 438 267 153A 1.3 3040204 90 36.323 3,211 50,223 78.47 463 267 268 153A 1.2 3040204 s0 80,83B 3,435 104.479 163.25 495 260 269 153A 1.1 3040204 Be 19,535 2,678 29.041 45.30 431 271 153A 1.3 3040203 220 33,024 2,534 50,807 79.39 426 272 153A !.2 3040206 66 4.453 2,330 .8,669 13.55 329 273 1536 1.1 3040206 100 13,533 2,119 23.110 36.11 375 274 153A 1.2 3040206 110 24,611 3,037 32,728 51.14 481 274 275 1534 1.2 3040206 120 70.894 3,240 84.572 132.14 536 275 276 153A 1.1 3040206 91 17,527 1.789 35,456 55.40 316 ILRA 153A TOTAL TONS 3234294 TOTAL SO M1 7,223 TONS ISO MI 440B OF NATERSHEDS 33 0 0 35 1539 1.0 3060109 60 5.483 589 36,079 56.37 97 40 1538 1.1 3050208 130 31,123 1,080 93,389 145.92 . 213 40 41 153B 1.1 305020B 140 4,751 535 2B.170 44.02 IOB 42 1530 1.0 3050208 110 11,510 608 58,754 91.90 125 43 153B 1.2 3050200 90 134,745 2.098 217.430 339.73 397 43 44 1538 1.6 3050208 100 54.306 1.342 125.543 196.16 277 44 45 1538 1.2 3050208 10 99,031 1.602 207.002 323.44 306 45 46 1538 1.0 3050208 40 12,399 681 51,864 81.04 153 Bl 153B 1.2 3050205 60 42.668 1.09 142,644 222.88 191 82 153B 1.2 3050205 70 58,679 2,275 95,969 149.95 391 02 94 1538 1.6 3050202 40 8.012 670 41,693 65.15 135 95 1538 1.4 3050202 50 60,043 1,215 143.929 224.89 267 95 96 1538 1.1 3050202 60 9,800 302 86,994 135.93 72 97 153B 1.3 3050202 70 29,334 1,555 52,695 B2.34 356 97 101 1538 1.2 3050201 40 8.153 258 104,600 163.45 50 102 1530 1.3 3050201 50 8,187 575 44,204 69.07 119 104 153B 1.3 3050201 70 4,734 393 38,362 59.94 79 105 1538 1.3 3050201 80 15,524 869 60,404 94.40 164 197 1530 1.2 3050112 30 43,673 974 166,871 260.74 167 198 1530 1.2 3050112 40 19,328 1,425 45,924 71.76 269 198 199 153B 1.2 3050112 50 4,170 264 52,309 01.06 51 200 153B 1.1 3050112 60 i,.442 902 60,700 94.97 194 238 1530 1.1 3040205 180 18,050 764 85,530 133.64 135 239 153B 1.2 3040207 40 22.985 767 106.170 165.89 139 240 1538 1.1 3040207 50 3,325 236 45,617 71.28 47 241 153B 2.3 3040207 30 8,695 1,115 28.794 44.99 193 259 153B 1.3 3040201 170 18,172 004 74,945 117.10 155 277 153S 1.1 3040206 130 13,594 623 70,714 110.49 123 278 153B 1.2 3040206 140 26,756 944 102.631 160.36 167 279 153B 1.3 3040206 150 2.B60 290 37,334 58.33 49 HLRA 1530 TOTAL TONS 799332 TOTAL SO NI 3,910 TONS ISO Hl 204 1 OF WATERSHEDS B O O 1 130 43.1 3060102 30 321,187 12B.128 15.924 24.00 12,909 1 2 130 27.7 3060102 60 027,147 92,267 58.823 91.91 B.999 2 3 130 22.3 3060102 120 367,789 23.,45 71.099 111.09 3,311 6 130 45.2 3060101 20 25,967 5.632 31.245 48.82 532 NSH 8 nLRA AVG SLOPE CAT I UNITS TONS NS/L AREA (ACRES) AREA ISO mI) TONSISO nI >)A )2NA )31A 10 130 27.9 3060101 30 598,207 40,596 67.877 106.06 5.640 10 106 130 29.2 3050109 to 581.387 57.918 45.914 71.74 8.104 i06 107 130 30.2 3050109 20 810.595 43.817 86,035 134.43 6,030 107 108 130 25.5 3050109 30 29,730 6,729 29.130 45.52 653 NLRA 130 TOTAL TONS 3562009 TOTAL SO lI 634 TONS ISO MI 5,614 I OF WATERSHEDS 4 1 0 50 133 4.0 3050207 10 69,172 5,877 51,736 80.84 856 50 51 133 3.8 3050207 20 33.640 8,358 16,576 25.90 1,299 51 55 133 2.6 3050207 60 126,919 7,150 73,136 114.28 1.111 55 63 133 4.3 3050204 30 102,282 8,673 70,315 122.37 836 63 65 133 4.1 3050204 60 45,582 8,539 26,154 40.07 1.115 65 66 133 3.5 3050204 70 32,477 6,609 23,644 36.94 979 66 67 133 3.2 3050204 50 309,415 80,340 171,329 267.70 1,156 67 73 133 3.4 3050203 60 59,087 5.083 57,034 89.12 663 74 133 3.3 3050203 70 38.212 4,392 50,797 79.37 481 83 133 3.2 3050206 10 64,585 5,746 54,098 84.53 764 83 186 133 2.6 3050110 50 50.135 3,979 65,000 101.56 494 187 133 2.9 3050110 60 32,404 4,782 36,513 57.05 568 188 133 2.1 3050110 70 40,391 4,231 47,119 73.62 549 189 133 2.1 3050111 10 101,547 4,451 122.568 191.51 530 190 133 2.7 3050111 20 67.921 6.941 59,781 93.41 726 190 191 133 2.9 3050111 29 11.310 7.209 9.558 14.93 757 191 192 133 2.0 3050111 30 32.850 6,038 29,070 45.42 723 192 193 133 1.7 3050111 40 17.243 4.449 19.828 30.90 557 T.- 194 133 1.9 3050111 50 1B.361 3.401 30.177 47.15 389 tQ 211 133 2.5 3040202 90 125,433 5,849 115,135 179.90 697 211 223 133 2.0 3040205 10 75.652 6.218 60.009 93.76 807 223 225 133 2.B 3040205 60 84,539 7.281 59.614 93.15 908 225 226 133 1.8 3040205 50 29,167 4.697 28.883 45.13 646 227 133 2.9 3040205 80 68,909 5.070 98.667 154.17 447 228 133 1.8 3040205 90 139.511 4.293 174,591 272.80 511 245 133 3.2 3040201 33 24,549 9.553 16,398 25.62 958 245 246 133 3.3 3040201 29 5,452 7.923 4.300 6.72 8ll 246 247 133 4.5 3040201 19 5.093 101.670 5.842 9.13 558 248 133 6.3 3040201 41 9.942 4,183 17,990 28.11 354 249 133 2.5 3040201 50 193.145 4.287 231.862 362.28 533 250 133 2.6 3040201 72 57.030 7.598 43,957 69.6e 830 250 251 133 2.2 3040201 97 5,891 5,560 6,771 10.58 557 252 133 2.0 3040201 70 86.955 6.672 73.086 114.20 761 252 254 133 1.8 3040201 130 111,453 4,282 145,431 227.24 490 255 133 1.5 3040201 120 62.454 2.683 90.612 141.58 441 260 133 2.6 3040204 15 27,086 7.367 25,571 39.95 678 263 133 2.1 3040204 30 103.687 5,310 88.941 138.97 746 263 264 133 2.5 3040204 49 1.490 8.617 1,591 2.49 599 265 133 2.1 3040204 60 17.488 5.244 12,969 20.26 063 265 270 133 1.4 3040203 215 35.258 4,445 34,447 53.82 655 280 133 1.2 3040206 29 374 4,706 306 0.48 782 280 nLRA 133 TOTAL TONS 2523991 TOTAL SO nI 3,687 TONS /SO NI 605 4 OF NATERSHEDS 21 0 0 4 136 13.2 3060102 130 451.211 50,977 38.965 60.88 7,411 4 5 136 9.8 3060102 150 431,605 58.757 31.551 49.30 8.755 5 7 136 19.3 3060101 50 710,327 34,122 94,219 147.22 4.825 7 e 136 11.1 3060101 0o 713.236 50,939 61.640 96.31 7,405 8 9 136 10.7 3060101 40 1.271,749 49.261 111,320 173.94 7,312 9 11 136 9.6 3060101 70 103,111 15,853 30,909 48.30 2,135 12 136 13.7 3060101 60 870.078 50.849 75,330 117.70 7,392 12 WSH I MLRA AVG SLOPE CAT I UNITI TONS MGlL AREA (ACRES) AREA ISO 900 TONS/SO Ml >W M20 MA0 13 136 9.2 3060101 90 306,059 33.929 43.600 60.13 4,493 13 14 136 9.5 3060101 100 476,077 470910 50.134 78.33 6,008l 14 Is 136 11.5 3060103 20 159.031 104.546 9,699 13.50 11,773 15 16 136 9.9 3060103 30 051.810 41,345 123,004 193.44 4,403 16 07 136 9.5 3060103 so l00,369 40,023 27.736 43.34 4,162 17 Is 136 0.8 3060103 70 984,041 47.811 120.835 201.30 4,080 to 19 136 10.7 3060103 100 70,193 7.843 72,296 112.96 692 20 136 9.3 3060103 140 1,097,467 36,754 214.020 334.41 3.202 21 136 9.2 3060103 050 377.620 10.609 152,706 230.60 1 .593 22 13. 7.4 3060187 to 206,857 14,054 162,15 253.31 1.132 23 136 7.2 3060107 20 360,059 20,611 150,105 234.63 1,569 24 136 7.0 3060107 30 41,025 13.050 27,449 42.89 975 25 136 8.7 3060107 to 112,089 7.709 1 44.077 225.12 490 26 136 7.4 3060106 30 17,130 6,687 26.956 41.90 400 109 136 11.6 3050109 40 678.009 34,104 04,423 131.90 5.140 109 Ito 136 11.5 3050109 so 219,068 MM06 21.341 33.35 6,513 110 III 136 10.0 3050109 60 200.915 30.489 25.650 40.00 5,213 III 112 136 9.7 3050109 70 77,038 34,639 01.240 17.50 4.303 112 113 1 36 00.0 3050009 00 1,009.242 30,030 162,650 254.14 3.971 113 114 136 9.2 3050109 90 233,232 41,616 20,240 44.13 5.206 104 115 136 10.3 3050109 too 301.153 21.601 73.699 1 15.14 2.616 016 136i 13.0 3050109 Ito 200,155 01.016 24.593 30.43 7.514 116 117 136 12.6 305D009 120 544,150 62,616 56.640l 00.51 6.148 117 100 ip036 11.5 3050109 130 748,915 54.720 09,504 139.05 5.355 lie L3 109 136 0.0 3050109 140 300,215 20.371 100.310 156.70 0.966 120 136 9.3 3050109 150 969,363 45,431 166,801 260.75 3.718 120 121 136 10.8 3050009 160 481.120 45.137 80.104 125.16 3,844 121 132 136 11.0 3050109 113 395,019 421.631 72.111 113.61 3,404 123 1 36 7.2 3050109 170 1,004.447 52.643 140,192 232.49 4.320 123 124 136 5.9 3050109 100 1 96.528 21,034 68,075 106.37 0.049 025 136 7.7 3050109 190 454.428 45.765 107,129 167.39' 2,715 126 136 5.0 3050109 200 20.200 12,594 13.601 21.25 951 127 136 6i.8 3050109 210 0 9,795 8,972 61,185 95.60 939 120 136 10.1 3050000 to 1,515,659 55.613 1 030696 2 66.11 5,603 130 029 136 12.3 30501009 20 243,055 21.329 72.375 113.09 2,149 130 136 11.9 3050108 30 329,060 63,4080 35.130 54.99 5.977 130 131 1 36 11.9 3050108 40 303,091 33.880 68,431 006.92 3.583 132 136 13.3 3050109 43 56,791 14,359 24,603 30.44 1,477 133 136 12.5 3050100 50 391,993 22.587 119,969 197.45 2,091 134 136 9.4 3050103 10 745,230 42.720 114,621 179.10 4.160 134 135 136 10.0 3050107 20 162,093 37,404 26,155 40.87 3,906 135 136 136 0.0 3050107 30 107,597 24,538 26.530 41.45 2.596 137 036 0 .9 3050107 40 507,972 30.068 65.505 1 02.35 5,745 137 130 136 13.0 3050107 50 912,159 28,123 153,360 239.64 3,806 130 139 136 11.5 3050107 60 973,799 29.472 151.156 243.99 3,991 139 140 136 00.9 3050105 055 361,332 51,942 30,612 41.03 3,554 040 141 136 9.5 3050105 160 664.451 50,001 56,312 00.07 7.545 141 142 136 0.9 3050105 100 516,201 35,022 59,920 93.63 5.514 142 143 1 36 10.0 3050105 170 1.152.221 50.491 8 4.612 132.21 0,715 143 144 136 9.2 3050105 50 104,504 110,070 6,079 9.50 10,002 144 145 1 36 10.0 3050105 94 850,675 40,205 91,510 143.09 5,946 145 046 136 1.0 3050105 100 1 32,006 30,916 04.777 23.49 5,152 146 147 136 13.0 3050105 130 1,182,879 51,447 99,052 154.77 7,643 147 148 136 6.9 3050105 109 90,583 40,076 05,213 23.77 4,147 140 NSH I HLRA AVG SLOPE CAT I UNITI TONS 011L AREA (ACRESI AREA ISO ll) TONS7 SO 1 )NA )2NA )3MA 149 136 7.5 3050105 122 55,793 9.751 26.688 41.70 1.339 150 136 13.3 3050105 142 958.,000 51,167 77,287 120.76 7,933 150 151 136 12.3 3050105 190 625,964 40,863 00,757 126.18 4.961 151 152 136 9.0 3050101 190 239,391 25.672 41,475 64.00 3,694 152 153 136 8.1 3050101 200 273,212 30,740 39,439 61.62 4,434 153 154 136 16.7 3050106 10 427,030 24,256 78,463 122.60 3,483 155 136 13.9 3050106 20 874,028 41,294 97,570 152.45 5,733 155 156 136 12.1 3050106 30 149,771 21,053 35.169 54.95 2,726 157 136 16.9 3050106 40 409,543 26,617 102,907 160.79 2,547 158 136 14.8 3050106 50 507,798 30,952 143,543 224.29 2,621 159 136 8.6 3050106 60 253,122 12,165 150,469 247.61bl 1,022 160 136 14.4 3050106 70 244,194 16,050 120.423 180.16 1,298 161 136 12.2 3050106 80 116,151 23,626 39,281 61.39 1,092 162 136 8.8 3050106 90 84,155 11,204 61.738 96.47 872 163 136 8.2 3050103 10 171,105 13.685 95.168 14B.70 1,151 164 136 7.8 3050103 28 7B,374 19,542 28,052 43.83 1.788 IbS 136 8.4 3050103 308 76,512 27,706 22,626 35.35 2,164 166 136 5.9 3050103 50 113,067 31,303 27,420 42.84 2,658 167 136 8.5 3050103 60b 842.362 41.536 140,597 219.b8 3,834 167 168 136 11.3 3050103 70 80.249 40,123 I5.677 24.50 3,276 169 136 13.6 3050103 90 874,567 45,329 139,195 217.49 4,021 169 170 136 9.1 3050103 42 628,620 36,807 128,786 201.23 3,124 171 136 7.2 3050103 80 35,007 10,951 22.439 35.06 999 172 136 18.6 3050104 10 599,975 42,374 167,751 262.11 2,289 -- 173 136 21.0 3050104 20 231.490 54,892 38,757 60.56 3,823 173 175 136 10.0 3050104 40 03,161 21,133 45,113 70.49 1,180 176 136 7.2 3050104 SO 71,161 16,639 39,281 61.38 1,159 201 136 9.2 3040105 80 29.945 223.203 1,799 2.01 10,653 201 202 136 8.0 3040104 60 39,385 105,960 4,507 7.04 5,593 202 203 136 8.7 3040202 15 125,167 88,555 17,772 27.77 4.507 203 204 136 0.6 3040202 20 72,437 77,814 9,983 15.60 4,644 204 205 136 4.9 3040202 50 67,627 16,750 30,572 47.77 1,416 206 136 8.5 3040202 30 135.835 29.081 38,115 59.55 2,281 207 136 7.0 3040202 40 32,714 13,015 30.404 47.51 689 200 136 7.4 3040202 70 105,769 16,004 79,047 124.76 848 NLRA 136 TOTAL TONS 39383610 TOTAL SO Ml 10,769 TONS /SDO l 3,657 O DF WATERSHEDS 39 11 2 27 137 5.2 3060106 50 32.448 3,595 101.356 158.37 205 28 137 4.2 3060106 60bO 155,352 7.904 119,840 187.25 030 28 29 137 5.8 3060106 100 109,026 5.631 141,369 220.89 494 30 137 3.2 3060106 110 13,421 1,040 86,519 135.19 99 31 137 3.1 3060106 130 52,210 3.661 100.225 169.10 309 52 137 3.6 3050207 30 18.087 6,692 11.626 10.17 996 52 56 137 2.6 3050207 70 42,740 4.258 38,777 60.59 705 61 137 4.7 3050204 20 152,052 8,844 96,038 150.Db06 1,013 61 62 137 5.5 3050204 10 209,111 10,203 141,962 221.02 943 62 64 137 5.4 3050204 40 78,461 9.915 40,398 63.12 1,243 64 69 137 5.5 3050203 10 46,923 7,067 54.375 84.96 552 69 137 5.6 3050203 30 24.058 5,533 41.377 64.65 384 70 137 4.9 3050203 20 33.859 5.491 63,241 98.81 343 71 137 4.6 3050203 40 209,031 10.857 122.341 191.16 1,093 71 72 137 5.1 3050203 50 103,855 10,969 55.136 86.15 1,206 72 174 137 3.9 3050104 30 197,973 5,239 232.079 362.62 546 177 137 6.0 3050104 60 77.455 10,889 79.630 124.42 623 178 137 4.9 3050104 70 19,512 5,930 43.343 67.72 288 NSH HNLRA AVB SLOPE CAT UNITI TONS tN6/L AREA IACRES) AREA I(So R1 TONS/SO il )NA )20A )380 179 137 5.9 3050104 g o 111.684 15.100 43.323 67.69 1.650 179 I1O 137 3.4 3050104 90 10,174 1.700 50.e06 79.38 128 181 137 7.5 3050104 100 14,513 1,940 47,821 74.72 194 102 137 3.7 3050110 10 50.034 2,300 139.619 210.15 229 183 137 5.8 3050110 20 46.539 3,653 100,603 157.32 296 184 137 4, 3050110 30 27,499 3,486 46,427 72.54 379 185 137 5.9 3050110 40 17,651 4,353 33,330 52.08 339 209 137 4.D 3040202 60 156,031 11,166 123.586 193.10 B 80 209 210 137 4.6 3040202 80 20,890 5.054 51.310 80.17 261 221 137 4.6 3040205 30 160,B36 14,314 71,949 112.42 1,502 221 222 137 3.4 3040205 40 17,892 7,303 13,146 20.54 071 222 242 137 5.7 3040201 62 561,464 21,006 184,090 20B.89 1,944 242 243 137 5.2 3040201 100 179,711 10,014 110,628 172.86 1,040 243 244 137 5.1 3040201 80 57,140 8,409 49,265 76.98 742 244 253 137 2.7 3040201 110 244,30 6,b600 206,705 322.09 757 253 1LRA 137 TOTAL TONS 3260812 TOTAL S0 Ml 4,455 TONS /ISO l 732 4 OF WATERSHEDS 12 3 0 t OF WATERSHEDS 117 IS 2 U,~ APPENDIX B SEDCAD+ INPUTS BY WATERSHED 46 AVERAGE AVERAGE AVERAGE AVERAGE AVERAGE AVERAGE HBO CP TIME OF I FINER SIZE (990 WATERSHED S x flu 0 x Osi I c L CURVE I CURVE 0 CONCENTRATION 0.001 0.003 0.004 0.052 0.063 0.635 1.177 ACRES 1 43,05 0.22 0.60 0.20 0.12 100.00 71.18 0.056 1.13 ox 10 20 70 60 761 1000 15,923.99 2 27.66 0.22 0.60 0.28 0.13 102.94 69.28 0.097 1.93 ox 20 20 60 60 760 1000 59,822.09 3 22.34 0.23 0.59 0.27 0.14 107.83 66.29 0.09 9.16 00 20 30 40 50 760 1000 71,099.49 4 13.21 0.25 0.56 0.27 0.17 151.77 67.75 0.357 6.06 ox 20 40 20 20 760 toot 3B,964.65 5 9.83 0.26 0.60 0.27 0.13 181.24 69.981 0.619 6.36 00 21 30 40 50 760 1000 31,551.45 6 45.24 0.23 0.61 0.20 0.12 100.00 67.62 0.003 2.56 00 it 20 60 70 760 1000 31,245.03 7 19.34 0.24 0.59 0.26 0.14 133.51 67.40 0.132 6.09 00 20 30 40 50 760 1000 94,219.43 a 11.01 0.26 0 .59 0.27 0.13 175.99 67.76 0.39 6.95 ox 20 30 40 50 761 1000 61,639.99 9 10.74 0.26 0.59 0.27 0.14 176.67 69.10 0.360 12.15 00 20 30 40 50 760 1000 111,319.69 10 27.77 0.23 0.59 0.28 0.13 101.60 66.02 0.110 6.46 00 21 30 50 60 760 1000 67,877.13 1l 9.55 0.26 0.59 0.27 0.14 175.37 69.95 0.19 C.39 00 21 30 40 50 760 1000 30,908.95 12 13.73 0.25 0.59 0.27 0.14 152.47 60.29 0.31 6.54 00 20 30 50 50 761 1000 75,330.07 13 9.21 0.26 0.61 0.27 0.12 190.62 68.83 0.41 10.45 00 10 21 60 60 760 1000 43,600.70 14 9.46 0.26 0.61 0.27 0.12 166.92 66.05 0.54 10.06 00 It 20 60 72 760 1000 50,134.30 Is 11.45 0.26 0.59 0.27 0.15 182.41 69.61 0.631 1.35 ox 20 30 30 40 760100 6ot ,666.51 16 9.94 0.21 0.60 0.27 0.13 195.67 68.98 0.353 7.94 00 20 31 50 50 760 1000 123,603.95 17 9.52 0.2.6 0.62 0.27 0.11 125.55 67.93 0.455 7.45 00 10 20 60 71 760 1000 27,736.02 to 8.76 0.26 0.60 0.27 0.11 197.55 69.37 0.406 14.50 00 10 20 60 70 760 1000 1280,35.08 19 10.73 0.30 0.51 0.35 0.14 190.99 66.96 0.046 5.76 00 20 31 90 010 760 1000 72,295.52 20 9.27 0.26 0.60 0.26 0.12 199.40 66.71 0.307 16.63 02 20 20 50 60 760 1000 214,020.04 21 9.20 0.26 0.62 0.26 0.12 202.94 66.33 0.160 1 5.37 ox 10 20 50 60 7 60 1000 152,706.24 22 7.36 0.33 0.44 0.42 0.14 236.26 66.53 0.124 16.28 00 20 30 040 160 760 1000 162,155.866 23 7.23 0.35 0.36 0.49 0.15 237.42 66.40 0.170 04.92 00 22 30 lot 210 760 1000 150,165.92 24 6.97 0.31 0.45 0.41 0.14 246.66 66.43 0.151 10.40 00 20 30 132 160 760 1000 27,449.36 25 9.11 0.24 0.64 0.25 0.11 224.52 62.07 0.073 12.09 at 10 20 52 60 760 1000 144,077.04 26 7.42 0.20 0.69 0.21 0.16 283.94 68.99 0.062 4.40 ox It 20 30 30 760 1000 26,056.29 27 5.20 0 .12 0.62 0.12 0.07 375.00 55.76 0.115 19.73 00 10 it 10 It 760 1000 101,356.06 28 4.23 0.17 0.70 0.19 0.10 366.11 73.33 0.236 11.87 00 10 20 30 30 760 0000 119,840.15 29 5.60 0.13 0.78 0.04 0.07 340.64 69.35 0.143 1 5.65 00 it It 20 20 760 1000 141,369.68 30 3.16 0.14 0.70 0.16 0.09 360.90 67.21 0.060 16.37 00 It 22 22 20 760 1001 86,519.37 31 3.09 0.13 0.60 0.13 0,07 375.00 66.61 0.265 20.48 00 10 10 10 it 761 1000 100,225.82 32 1.66 0.16 0.67 0.20 0.11 370.84 77.44 0.279 10.99 ox 10 20 31 30 761 1000 69,715.65 33 1.33 0.21 0.55 0.30 0.15 375.00 84.64 0.195 29.45 00 20 30 50 60 760 tool 95,109.03 34 1.16 0.20 0.64 0.24 0.11 374.93 86.49 0.157 20.25 ox It 20 50 St 760 1000 79,807.77 35 1.02 0.03 0.28 0.46 0.26 375.00 94.13 0.054 3.50 ox 70 100 lot 100 762 1000 36,070.57 36 1.43 0.14 0.77 0.15 0.06 375.00 76.69 0.406 16.52 ox it it 20 20 761 1001090,042.24 37 1.40 0.15 0.71 0.16 0.06 375.00 80.69 0.529~ 11.39 00 It 10 20 30 761 1000 51,419.37 38 1.25 0.13 0.76 0.16 0.06 375.00 60.96 0.362 1 5.06 DI 10 10 20 30 760 10000 72,710.67 39 1.17 0.17 0.69 0.21 0.09 375.04 87.49 0.241 13.19 00 It 20 40 50 760 toot 57,765.25 40 1.09 0.19 0.52 0.33 0.16 375.00 88.35 0.094 20.12 00 20 31 70 70 760 1000 93,389.12 40 1.06 0.02 0.37 0.40 0.23 375.00 80.68 0.064 14.90 ox 50 70 70 70 760 1000 20,170.94 42 1.64 0.06 0.51 0.30 0.19 364.61 89.91 0.091 6.64 00 30 50 20 20 760 1000 50,753.70 43 1.17 0.13 0.52 0.31 0.17 375.00 95.96 0.225 1 6.27 00 30 40 50 50 760 1000 217,430.20 44 1.56 0.00 0.41 0.37 0.22 367.87 09.62 0.199 15.01 ox 40 71 40 40 760 1000 125,543.53 45 1.16 0.12 0.54 0.30 0.16 375.00 86.49 0.195 31.73 00 21 30 40 50 760 1000 207,002.02 46 1.03 0.10 0.34 0.42 0.24 375.00 93.76 0.0111 11.55 ox 50 02 70 70 760 1000 51,664.18 47 1.30 0.15 0.71 0.19 0.09 375.04 00.64 0.255 24.72 00 10 20 30 40 760 1000 103,026.55 48 1.12 0.16 0.64 0.24 0.11 375.00 85.84 0.190 1 6.37 DI 10 20 50 60 760 1000 97,293.52 49 1.21 0.15 0.74 0.16 0.06 375.04 00.32 0.298 07.13 DI 10 10 30 30 760 1000 66,394.45 50 3.95 0.04 0.78 0.05 0.06 374.96 73.79 0.329 10.49 00 10 10 20 20 760 1000 51,735.68 51 3.03 0.05 0.76 0.16 0.06 375.00 77.25 0.406 7.66 ox it It 20 21 761 10000 16,576.37 52 3.56 0.15 0.77 0.15 0.06 375.00 75.20 0.451 13.09 ox it 10 21 21 760 1000 111,626.10 53 1.42 0.16 0.75 0.17 0.00 374.96 76.90 0.536 22.66 0 D10 10 30 30 760 1000 97,283.63 AVERAGE AVERAGE AVERAGE AVERAGE AVERAGE AVERAGE HSOS CI' TIKE OF I FIKER SIZE 119110 WATERSHED S K I osa I 0,1 I RD e 0 CURVE I CURVE I CONCENTRATIIIO 0.001 0.003 0.004 0.052 0.063 0.635 1.177 ACRES 54 1.49 0.15 0.72 0.19 0.09 375.08 82.42 0.330 22.42 ox 12 It 3? 42 762 1002 106,911.17 55 2.62 0.16 0.73 0.19 0.09 375.00 77.24 0.476 16.19 ox 12 it 32 31 76! 1001 73,135.70 56 2.59 0.15 0.73 0.19 0.09 375.00 79.60 0.306 10.46 DI It it 32 31 762 lO0l 39,777.05 57 1.32 0.16 0.74 0.19 0.08 375.00 70.36 0.358 12.59 ox it It 32 32 762 1002 34,665.09 59 1.53 0.16 0.72 0.19 0.09 374.96 01.33 0.327 14.7 02 12 22 3Z 42 762 1002 43,165.79 59 1.23 0.16 0.72 0.19 0.09 374.96 77.14 0.268 16.00 ox 12 It 32 42 762 1002 51,409.4 60 1.28 0.05 0.73 0.19 0.09 375.00 84.96 0.321 12.76 ox it it 32 42 761 1002 47,327.17 61 4.69 0.12 0.91 0.12 0.07 374.74 65.90 0.344 11.59 ox It 12 12 12 762 tool 96,039.18 62 5.46 0.13 0.91 0.12 0.07 363.65 66.26 0.272 16.12 02 it 12 it 12 762 1002 141,961.75 63 4.28 0.13 0.79 0.14 0.07 375.00 67.44 0.333 11.97 02 It 12 22 22 762 tool 78,315.20 64 5.39 0.12 0.92 0.10 0.06 375.04 72.62 0.376 1 0.19 ox It it 12 12 761 1002 40,399.11 65 4.07 0.13 0.91 0.12 0.07 375.04 73.96 0.536 6.14 ox 12 12 it It 762 1002 26,154.49 66 3.54 0.04 0.78 0.25 0.07 375.00 14.95 0.513 8 .52 DI It It 22 22 762 1002 23,643.82 67 3.20 0.15 0.72 0.19 0.09 315.09 77.15 0.492 17.67 DI 12 22 32 32 761 t002 171,329.71 68 5.52 0.13 0.92 0.11 0.06 217.44 61.92 0.225 0.09 01 12 12 12 12 762 1082 54,374.95 69 5.59 0.12 0.93 0.11 0.06 293.96 59.42 0.192 14.16 02 It it 12 12 761 1002 41,376.69 10 4.86 0.11 0.94 0.10 0.06 368.74 55.98 0.211 12.61 ox it 12 1% 12 762 0001 63,241.29 71 4.59 0.13 0.00 0.13 0.07 369.15 67.93 0.374 15.79 ox 12 12 12 12 762 1002 122,340.94 72 5.05 0.13 0.79 0.14 0.07 '342.01 69.46 0.403 11.49 DI 12 12 22 2? 762 1002 55,135.96 73 3.37 0.14 0.76 0.16 0.08 375.00 73.51 0.378 10.75 02 it 12 22 32 762 1003 57,033.79 74 3.31 0.14 0.76 0.16 0.09 375.04 69.95 0.319 12.25 02 12 It 22 32 762 1002 50,796.65 75 1.95 0.16 0.08 0.22 0.10 375.04 90.15 0.347 11.12 02 it 22 42 52 762 1002 59,932.719 76 1.43 0.17 0.69 0.21 0.10 374.96 92.70 0.172 17.62 02 it 22 42 42 762 1002 92,005.29 00 77 1.39 0.17 0.71 0.20 0.09 374.59 84.58 0.309 15.14 02 12 21 42 41 762 1002 36,641.91 79 1.21 0.15 0.74 0.19 0.09 374.96 91.04 0.161 15.27 01 it It 32 32 762 fool 43,650.12 79 1.49 0,17 0.70 0.21 0.09 375.04 73.89 0.345 23.33 ox it 22 42 41 761 10002 102,334.63 80 1.14 OX1 0.76 0.16 0.09 375.00 02.24 0.087 6.90 DI it 12 22 22 762 1002 14,184.31 el 1.22 0.14 0.56 0.29 0.15 375.00 09.12 0.011 24.72 02 22 3? 52 52 762 1002 142,643.78 82 1.24 0.11 0.51 0.31 0.19 375.00 87.01 0.335 9.75 02 32 42 42 32 76? 1002 95,969.99 93 2.39 0.15 0.74 0.19 0.09 375.04 74.69 0.541 9.14 02 it 12 3? 32 762 tool 54,098.08 84 1.46 0.17 0.70 0.21 0.09 375.00 75.93 0.473 19.41 DI 12 22 41 32 762 1002 69,063.27 95 1.43 0.17 0.71 0.20 0.09 375.00 74.93 0.424 20.19 DI It 21 42 42 761 1002 50,836.18 86 1.43 0.17 0.69 0.22 0.09 375.00 80.37 0.294 1 5.74 DI it 22 42 5? 762 1002 65,593.80 97 1.39 0.17 0.70 0.21 0.09 375.00 72.94 0.617 17.03 ox 12 2? 42 52 767 1002 20,273.19 es 1.53 0.17 0.70 0.21 0.09 374.96 69.77 0.587 9.49 ox 12 21 42 52 762 tool 13,169.16 99 1.34 0.17 0.70 0.21 0.09 374.10 78.40 0.290 1 4.16 02 It 22 42 42 762 1002 71,020.41 90 1 .20 0.08 0.66 0.24 0.10 375.00 79.90 0.194 15.87 ox 12 2? 52 f i t 761 1002 91,471.52 91 1.13 0.19 0.62 0.27 0.10 375.00 81.11 0.117 17.31 02 It 21 61 72 762 1002 90,038.27 92 1.36 0.24 0.51 0.36 0.13 375.00 77.45 0.193 14.44 02 22 32 102 122 762 10002 61,956.29 93 1.44 0.16 0.70 0.20 0.00 375.00 79.46 0.108 10.41 ox it 22 4? 42 762 1002 23,327.51 94 1 .56 0.14 0.59 0.26 0.05 375.00 94.18 0.066 13.32 Of 22 32 21 22 716 1002 41,692.99 95 1.43 0.16 0.63 0.24 0.13 375.00 99.20 0.094 17.10 CZ 21 22 42 41 761 1002 143,928.77 96 1.12 R.00 0.32 0.43 0.26 375.00 91.63 0.055 23.19 DI 621 0 lo2A 52 762 1002 86,993.83 97 1.25 0.10 0.43 0.36 0.2.1 375.00 90.27 0.229 01.39 02 41 6? 41 41 7 16 0002 52,694.48 99 1.16 0.16 0.71 0.20 0.09 375.00 93.91 0.169 6.47 02 It 21 32 42 762 JODI 39,300.93 99 1.13 0.15 0.67 0.23 0.00 375.00 87.04 0.015 1 2.86 CZ it 22 Al 52 762 1002 72,542.63 too 0.12 0.13 0.57 0.29 0.15 375.00 84.41 0.135 11.95 02 22 32 52 52 762 1002 43,343.70 101 1.16 0.14 0.69 0.21 0.10 375.00 81.72 0.020 16.42 ox 12 22 32 Al 762 1002 004,608.09 102 1.26 0.12 0.57 0.28 0.16 375.00 85.04 0.074 16.37 02 22 32 32 32 762 1002 44,203.66 103 1 .12 0.15 0.59 0.79 0.13 375.00 85.87 0.081 1 4.52 ox 22 31 52 62 762 1002 50,610.72 104 1.25 0.14 0.58 0.28 0.14 375.00 05.42 0.044 10.31 CZ 2Z 32 41 52 762 JODI 30,361.90 005 1 .28 0.13 0.60 0.25 0.14 375.00 01.41 0.105 16.09 ox 22 32 32 32 762 1002 60,463.73 106 29.16 0.24 0.60 0.27 0.13 133.49 66.02 0.124 6.41 Of 22 22 52 62 762 1002 45,913.69 AVERAGE AVERAGE AVERAGE AVERAGE AVERAGE AVERAGE HGS CP TIRE or I FINER SIZE (11111 WATERSHED S x I~ Ds j I Os %ol L CURVE I CURVE I CONCENTRATION 0.001 0.003 0.004 0.052 0.063 0.635 1.177 ACRES 107 30.24 0.23 0.61 0.27 0.12 109.32 65.91 0.092 5.61 00 10 20 60 70 76? 100% 86,035.03 IOU 25.40 0.23 0.58 0.28 0.14 106.53 65.75 0.138 4.19 00 20 30 50 50 760 1000 29,129.74 109 11.59 0.26 0.59 0.27 0.15 175.50 70.27 0.221 12.34 00 20 30 30 30 760 1000 94,423.05 110 11.47 0.26 0.59 0.27 0.15 196.39 69.79 0.286 4.41 ox 20 31 30 30 760 1000 21,340.72 III 10.04 0.26 0.61 0.27 0.12 185.79 69.75 0.428 5.90 00 20 20 50 60 760 l000 25,650.39 112 9.74 0.26 0.61 0.27 0.12 109.95 70.20 0.395 5.06 00 20 20 50 60 760 10000 11,248.61 113 10.76 0.26 0.61 0.25 0.11 199.10 68.94 0.223 10.70 00 20 30 30 30 760 1000 162,650.09 114 9.23 0.26 0.61 0.27 0.12 204.76 68.23 0.503 7.99 00 20 20 5% 60 760 1000 29,240.13 115 10.33 0.26 0.61 0.27 0.13 180.64 73.87 0.103 10.58 00 20 20 50 52 760 1000 73,689.24 116 13.04 0.25 0.56 0.27 0.17 156.34 69.03 0.519 5.23 ox 30 40 10 10 760 1000 24,592.73 117 12.57 0.26 0.59 0.26 0.15 170.53 69.19 0.397 9.59 00 20 30 30 30 760 1000 56,649.29 118 11.47 0.25 0.61 0.25 0.04 091.99 69.77 0.377 11.30 Al 20 30 20 20 760 1000 89,504.50 119 7.98 0.26 0.63 0.25 0.12 244.13 69.50 0.213 10.99 00 20 20 40 40 760 10021 100,337.96 120 9.33 0.29 0.53 0.33 0.13 205.08 68.31 0.340 1 4.76 00 20 30 90 100 760 1000 166,9930.67 121 10.83 0.26 0.60 0.26 0.00 097.89 68.62 0.305 9.93 00 20 30 40 40 760 1000 00,104.30 122 10.95 0.26 0.63 0.25 0.12 192.22 67.85 0.286 9.28 00 10 20 40 50 760 1000 72,710.67 123 7.21 0.37 0.32 0.52 0.16 231.70 67.61 0.425 12.37 00 20 30 200 230 760 1000 146,791.97 124 5.90 0.26 0.56 0.32 0.11 273.68 69.58 0.320 10.21 ox 10 20 90 110 760 0000 69,074.92 125 7.72 0.32 0.43 0.42 0.14 234.90 67.44 0.263 4.71 . 00 20 30 140 160 760 1000 107,128.63 126 5.78 0.20 0.72 0.19 0.09 277.63 66.67 0.271 1 5.55 00 10 20 30 30 760 1000 13,601.13 127 6.00 0.22 0.63 0.27 0.10 253.78 70.97 0.149 10.98 00 10 20 70 80 760 1000 61,105.30 1028 10.18 0.26 0.60 0.27 0.14 099.29 69.981 0.401 15.71 00 20 30 40 50 763 1000 170,696.10 129 12.29 0.26 0.60 0.26 0.14 163.97 70.47 0.139 12.25 00 20 30 30 30 760 1000 72,374.59 130 11.89 0.26 0.59 0.27 0.15 182.06 67.95 0.442 6.52 00 20 30 30 30 760 1000 35,129.65 131 11.93 0.26 0.60 0.26 0.14 176.001 71.21 0.229 8.73 00 20 30 40 40 760 1000 60,430.66 132 13.34 0.26 0.61 0.26 0.13 149.91 70.59 0.095 5.60 00 20 30 40 40 761 1000 24,602.62 133 12.54 0.26 0.61 0.26 0.13 157.02 67.94 0.135 11.42 00 20 30 40 40 760 1000 119,960.65 134 9.36 0.26 0.58 0.27 0.15 194.57 68.67 0.393 16.32 00 20 ME 40 40 760 1000 114,621.11 135 10.04 0.27 0.55 0.28 0.17 198.74 69.49 0.369 39.08 00 30 40 20 It 760 1000 26,154.49 136 8.76 0.27 0.60 0.27 0.14 205.49 69.05 0.284 7.54 00 20 30 40 40 760 1000 26,530.10 137 8.91 0.26 0.60 0.27 0.13 204.33 68.52 0.404 13.76 00 20 20 51 60 760 10000 65,504.84 138 13.11 0.26 0.59 0.26 0.05 153.19 70.37 0.174 14.01 00 21 30 20 20 760 1000 153,368.51 139 11.45 0.26 0.60 0.25 0.15 172.97 70.35 0.205 15.22 00 21 30 30 30 760 1000 156,155.95 140 10.97 0.26 0.59 0.27 0.14 173.69 68.12 0.448 9.24 00 20 30 40 40 760 1000 30,612.42 141 9.51 0.26 0.60 0.27 0.13 190.50 69.72 0.417 10.31 00 20 30 50 50 760 1000 56,361.64 042 9.94 0.26 0.62 0.27 0.11 199.06 72.17 0.345 10.09 ox it 20 60 70 760 1000 59,920.09 143 10.75 0.25 0.60 0.27 0.13 172.74 60.56 0.461 9.74 00 20 30 51 50 760 100%084,611.65 144 9.22 0.26 0.63 0.25 0.12 099.39 68.29 0.581 1.51 00 10 20 50 50 760 1000 6,078.99 145 10.81 0.31 0.41 0.41 0.15 192.41 68.79 0.236 13.54 09 20 30 130 150 760 1000 91,570.37 146 6.99 0.30 0.52 0.36 0.12 224.75 69.49 0.560 7.43 00 20 20 100 1 20 760 1000 14,777.39 147 12.95 0.27 0.53 0.32 0.15 166.11 69.21 0.292 9.69 00 20 30 70 80 760 1000 99,052.97 148 6.89 0.37 0.30 0.54 0.16 225.00 69.55 0.271 3.73 00 20 40 210 250 760 1000 15,212.31 149 7.50 0.36 0.27 0.57 0.16 225.00 65.60 0.107 6.71 00 20 00 230 270 760 10000 26,698.26 ISO 13.29 0.28 0.54 0.32 0.13 189.28 70.99 0.236 9.03 ox 20 30 80 90 760 1000 77,287.21 J51 12.26 0.26 0.59 0.27 0.15 161.41 67.45 0.286 10.69 00 20 30 30 30 760 10000 90,756.68 152 9.02 0.27 0.53 0.31 0.16 186.29 69.00 0.286 8.43 00 20 40 60 60 760 1000 41,475.53 153 0.14 0.26 0.50 0.27 0.14 212.44 67.70 0.391 , 7.57 ox 20 30 40 40 760 1000 39,439.31 154 16.70 0.25 0.60 0.25 0.14 117.80 72.59 0.120 7.97 DI 20 30 30 30 760 1000 78,463.47 155 13.93 0.25 0.63 0.23 0.14 100.74 70.69 0.222 9.75 00 20 30 it 10 760 1000 97,570.28 156 12.10 0.26 0.61 0.25 0.15 140.04 68.62 0.178 5.63 ox 20 30 20 20 760 1000 35,169.19 157 16.90 0.25 0.61 0.24 0.15 136.26 71.61 0.114 6.54 00 21 50 1% ox 760 1000 102,907.94 158 14.90 0.26 0.57 0.26 0.17 137.03 69.28 0.147 9.05 00 33 40 10 10 760 10000 143,543.20 159 9.64 0.29 0.47 0.39 0.14 236.67 68.58 0.095 14.53 ox 20 30 120 140 760 1000 158,469.93 AVERAGE AVERAGE AVERASE AVERAGE AVERAGE AVERAGE lOSS CP TIME OF I FINER SIZE INN) WATERSHED S K I Rus I as! 0 act I CURVE I CURVE 0 CONCENTRATION 0.001 0.003 0.004 0.052 0.063 0.635 1.177 ACRES 100 14.37 0.25 0.59 0.26 0.16 043.90 62.12 0.001 12.20 00 21 30 20 21 760 1001 120,423.34 161 12.19 0.24 0.61 0.21 0.17 103.24 07.04 0.105 5.70 00 30 41 -30 -41 700 1000 39,281.10 162 6.78 0.33 0.41 0.43 0.16 205.51 60.21 0.00K 8.99 ox 20 30 140 101 760 10000 61,730.813 163 8.20 0.30 0.50 0.35 0.15 209.55 08.85 0.125 14.51 00 21 31 80% 90 760 1002 95,160.34 104 7.75 0.27 0.55 0.30 0.15 204.25 70.57 0.256 6.50 00 20 30 52 50 761 10000 281,052.32 165 8.41 0.29 0.52 0.32 0.16 220.15 06.71 0.291 8.71 ox 20 41 fi t 70 760 10000 22,625.71 160 5.90 0.27 0.63 0.26 0.12 274.60 69.29 0.509 9.74 00 10 20 50 50 700 0000 27,419.71 067 8.52 0.26 0.01 0.25 0.14 226.46 71.46 0.315 13.93 00 71 32 30 32 700 1000 140,597.68 109 11.33 0.26 0.56 0.29 0.16 159.86 60.04 0.346 6.20 00 21 41 40 42 700 1000 15,076.88 169 13.57 0.25 0.60 0.24 0.15 055.20 70.45 0.243 9.49 ox 22 2 It 10 700 1000 139,974.96 170 9.10 0.31 0.40 0.39 0.15 217.33 68.80 0.268 9.0i2 ox 21 22I 10 030 763 1000 120,795.00 171 7.22 0.23 0.03 0.24 0.13 261.70 70.72 0.170 0.09 00 20 22 40 40 700 1000 22,437.90 112 18.56 0.25 0.60 0.26 0.14 134.55 69.08 0.079 4.42 00 21 31 41 40 761 1000 167,750.51 173 20.95 0.24 0.62 0.24 6.14 105.94 73.10 0.139 4.36 OX 20 30 30 30 760 1000 30,757.28 174 3.92 0.10 0.60 0.21 0.11 351.33 71.82 0.233 28.59 ox 21 20 30 30 700 0000 232,079.09 175 10.77 0.24 0.50 0.32 0.11 240.30 57.01 0.152 9.80 ox it 20 9? 110 760 1000 45,113.04 170 7.21 0.32 0.39 0.44 0.14 242.891 62.95 0.173 00.37 ox 20 30 160 190 760 1000 39,280.16 177 0.00 0.21 0.56 0.28 0.10 312.48 57.06 0.189 15.78 00 10 20 el 90 700 1000 79,629.85 178 4.85 0.11 0.05 0.00 0.06 375.00 49.10 0.307 17.00 el0 It ox 00 0 760 1000 43,343.70 179 5.93 0.04 0.77 0.15 O.Ke 318.90 73.23 0.447 9.04 DI It 10 20 21 760 1000 43.323.93 too 3.43 0.04 0.59 0.19 0.10 373.57 63.34 0.113 1 9.20 ox it 30 30 31 762 10000 50,806.53 191 7.54 0.05 0.74 0.07 0.09 289.69 71.01 0.039 9.17 00 it It 20 22 760 10000 47,821.40 1 n102 3.70 0.12 0.55 0.15 0.00 321.90 70.94 0.155 10.99 00 i 210 33? 30 760 1000 139,619.11 11:1 193 .9 0121 0.911 0.1 0.06 272.41 60.31 0.115 1 3.23 ox it 10 00 10 760 10000 100,683.91 14 400 0.4 0.72 1 .4 0.07 327.30 73.42 0.130 10.57 ox It It 20 20 761 0000 40,427.69 185 5.85 0.12 0.79 0.11 0.00 262.23 65.36 0.155 7.19 CZ 10 10 It 10 760 1000 33,330.67 096 2.63 0.19 0.62 0.25 0.13 357.21 76.47 0.278 05.34 DI 20 20 40 50 760 10000 65,000.73 1087 2.K9 0.19 0.65 0.24 0.11 348.24 75.10 0.320 12.54 DI it 30 40 40 760 1000 36,513.49 log 2.12 0.21 0.57 0.29 0.15 365.39 76.18 0.336 1 5.99 00 20 30 50 50 760 1000 47,119.00 111? 2.10 0.08 0.65 0.24 0.12 373.67 74.01 0.354 1 0.70 02 00 20 40 40 760 1000 122,568.20 190 2.70 0.17 0.70 0.20 0.10 375.00 70.74 0.487 14.30 ox It 20 32 32 760 1000 59,791.09 091 2.79 0.15 0.75 0.17 D.0" 375.00 69.92 0.691 7.54 ox 10 90 30 30 760 1002 9,550.33 092 1.99 0.18 0.70 0.20 0.10 375.00 71.07 0.594 10.77 ox 12 21 40 40 760 1000 29,070.43 193 1.74 0.07 0.69 0.21 0.00 375.00 73.27 0.559 9.94 ox 10 20 40 40 760 1000 19,828.39 194 1 .90 0.15 0.73 0.19 0.09 375.00 70.99 0.409 8.65 ox 00 20 30 31 760 0000 30,177.50 195 1 .39 0.21 0.50 0.32 0.17 375.00 84.69 0.170 1 0.49 00 30 41 50 60 700 1000 113,979.77 196 1.30 0.21 0.51 0.33 0.16 375.00 85.73 0.279 10.72 00 20 40 60 70 760 1000 34,744.15 197 1.22 8.08 0.57 0.29 0.14 375.00 86.80 0.092 19.97 02 20 30 50 60 760 1000 100,8170.79 190 1.20 0.09 0.57 0.29 0.14 375.00 86.11 0.133 10.99 ox 20 30 50 60 700 1000 45,923.57 199 1 .23 0.11 0.72 0.09 0.10 375.00 01.60 0.029 16.29 00 It 20 30 30 760 1000 52,390.00 200 1.10 0.01 0.39 0.39 0.23 375.00 87.37 0.131 12.36 ox 50 72 50 40 760 1000 60,700.03 201 9.16 0.30 0.27 0.57 0.00 225.00 68.71 0.068 0.72 00 20 41 230 270 761 1000 1,798.99 202 8.77 0.34 0.37 0.49 0.15 235.53 68.94 0.563 2.22 ox 20 30 192 211 760 0000 4,507.35 203 0.69 0.37 0.27 0.56 0.16 225.00 67.48 0.438 4.24 ox 21 41 230 270 700 1000 17,772.40 204 8.55 0.33 0.38 0.47 0.14 243.57 69.05 0.429 4.48 ox 20 20 170 200 760 1000 9,983.30 205 4.85 0.05 0.79 0.14 0.07 370.64 60.34 0.521 8.50 ox 00 10 20 20 760 10000 30,572.189 200 0.45 0.30 0.45 0.40 0.05 223.33 65.76 0.271 9.90 00 20 30 120 140 761 0000 39,114.78 207 7.07 0.21 0.03 0.26 0.00 284.69 53.00 0.232 10.77 ox 10 20 00 72 760 10000 30,404.04 209 1 .43 0.20 0.00 0.25 0.09 302.04 54.13 0.240 1 5.52 00 it 20 60 70 760 1000 79,947.30 209 4.84 0.02 0.80 0.12 0.07 374.96 61.90 0.365 1 9.64 ox it 00 it it 762 10000 123,580.39 210 4.55 0.12 0.90 0.13 0.07 375.00 52.02 0.227 09.02 ox 10 00 It it 760 1000 51,310.04 211 2.47 0.07 0.06 0.23 0.11 375.00 74.41 0.428 31.37 00 it 20 40 40 760 1000 115,135.11 212 0.63 0.20 0.55 0.30 0.16 375.00 72.64 0.559 8.89 ox 20 30 50 50 760 10000 10,438.07 AVERAGE AVERAGE AVERAGE AVER4GE AVERAGE AVERAGE HSG CP TIME OF 0FINER SIZE (ml) NATERSHER S K I osa 0 Cii C Oc) L CURVE I CURVE I CONCENTRATION 0.001 0.003 0.004 0.052 0.063 0.635 1.177 ACRES 213 1.60 0.17 0.70 0.20 0.09 375.00 73.79 0.602 32.34 ox 10 2Z 40 40 760 2000 111,260.37 214 1.44 0.16 0.71 0.20 0.09 375.00 73.90 0.519 23.97 ox 10 20 40 42 760 1000 39,974.23 215 1.42 0.25 0.73 0.19 0.09 375.00 78.60 0.511 10.10 00 10 it 30 31 760 1002 15,953.65 216 1.37 0.16 0.71 0.20 0.09 375.00 79.72 0.440 16.43 00 it 20 30 42 761 1000 35,920.41 217 1.26 0.20 0.59 0.28 0.13 375.00 77.99 0.327 32.06 02 22 32 52 6Z 760 looZ 103,006.50 218 1.29 0.15 0.74 A.17 0.09 375.00 79.91 0.401 13.98 00 1 It 1 30 30 762 1001 34,526.69 219 1.11 0.16 0.71 0.20 0.09 375.00 77.99 0.40 14.66 CC 10 20 30 40 760 1000 32,141.49 220 0.64 0,17 0.69 0.21 0.10 375.00 74.26 0.357 16.00 ox it 20 40 40 760 1000 40,576.03 221 4.58 0.14 0.75 0.16 0.09 315.00 71.11 0.492 13.05 00 10 it 22 20 762 1000 71,949.56 222 3.39 0.15 0.74 0.20 0.09 375.00 74.16 0.595 9.20 ox 10 10 30 30 760 1000 03,146.44 223 1.99 0.15 0.71 0.19 0.09 375.00 75.56 0.693 17.75 ox it 20 30 30 760 loot 60,009.04 224 1.55 0.15 0.74 0.17 0.09 375.00 75.45 0.540 9.07 ox It It 30 30 760 1000 9,509.23 225 2.78 0.15 0.74 0.17 0.09 374.24 74.91 0.601 13.54 ox 10 It 31 30 760 1000 59,613.65 226 1.91 0.16 0.69i 0.22 0.10 375.00 79.13 0.520 12.44 00 10 21 *4C 4% 760 1000 209,02.62 227 2.88 0.14 0.77 0.16 0.09 375.00 67.31 0.300 13.46 00 10 12 20 21 7 16 1000 90,667.47 229 1.75 0.15 0.73 0.19 0.09 375.00 74.46 0.442 30.91 ox 12 10 30 30 760 1000 174,590.61 229 1.54 0.16 0.70 0.21 0.10 375.00 70.26 0.361 22.52 CZ It 20 40 40 760 1000 83,267.36 230 0.52 0.15 0.74 0.10 0.09 375.00 76.55 0.424 26.06 ox 10 12 32 30 762 1000 120,719.07 231 1.42 0.16 0.72 0.19 0.09 375.00 79.75 0.202 11.65 ox 10 10 32 40 762 1000 24,711.35 232 1.34 R.16 0.73 0.19 0.09 375.00. 79.55 0.339 17.55 ox 11 10 30 40 760 2000 40,477.19 233 1.36 0.15 0.74 0.19 0.09 375.00 77.29 0.411 21.73 ox 10 10 30 30 762 10o0 50,114.61 234 1.41 0.17 0.71 0.20 0.09 375.00 77.29 0.360 23.36 00 10 20 40 40 760 1000 142,821.62 235 1.25 0.17 0.72 0.19 0.09 375.00 79.64 0.354 15.03 00 12 20 30 40 716 1000 04,552.35 236 1.17 0.15 0.69 0.22 0.10 375.00 93.07 0.199 22.44 ox 11 20 40 50 760 1002 117,002.36 237 1.16 0.25 0.69 0.21 0.10 375.00 91.11 0.192 16.75 02 It 20 42 40 760 1000 93,771.47 230 1.12 0.17 0.62 0.25 0.12 375.00 03.30 0. 077 16.49 ox 20 22 Al 50 7 16 1000 05,530.92 239 1.22 0.16 0.65 0.24 0.11 375.00 93.90 0.075 19.63 ox 10 20 42 50 760 1000 106,169.93 240 1.11 0.20 0.55 0.20 OX2 375.00 82.62 0.041 12.05 ox 32 42 21 20 760 loot 45,617.15 241 2.31 0.12 0.75 0.16 0.09 375.00 76.59 0.113 30.47 ox 10 20 It 10 762 1000 29,793.66 242 5.66 0.19 0,69 0.22 0.09 345.28 60.24 0.3066 10.99 00 1% 20 St 50 160 tool 194,990.30 243 5.15 0.13 0.00 0.12 0.07 375.00 69.60 0.318 16.30 CZ 10 12 10 12 761 1000 110,627.76 244 5.11 0.13 0.92 0.11 0.07 375.00 66.87 0.272 11.35 ox It 10 It 10 762 1000 49,264.54 245 3.10 0.22 0.64 0.24 0.11 373.01 69.79 0.507 10.37 ox It 20 40 50 762 tool 16,390.45 246 3.32 0.26 0.42 0.40 0.17 323.35 72.30 0.378 5.15 ox 32 40 II0 130 7 16 1000 4,299.77 247 4.52 0.15 0.77 0.15 0.09 329.10 66.91 0.321 3.90 00 10 10 20 20 760 1002 5,041.76 240 6.32 0.15 0.16 0.16 0.08 256.31 65.66 0.121 7.32 00 It 10 30 30 760 1002 17,989.06 249 2.54 0.20 0.50 0.29 0.15 361.65 74.91 0.252 29.09 ox 20 32 50 50 762 2001 231,861.63 250 2.60 0.19 0.71 0.20 0.09 369.60 72.32 0.552 11.13 ox 12 20 30 40 760 1000 43,956.54 251 2.19 0.19 0.67 0.23 0.10 375.00 70.35 0.534 6.70 00 It 20 50 50 760 1000 6,770.91 252 2.01 0.20 0.63 0.26 0.11 375.00 73.19 0.519 19.99 00 It 20 50 62 762 1002 73,086.20 253 2.60 0.15 0.74 0.17 0.09 375.00 70.92 0.460 33.97 ox 10 it 32 31 760 2002 206,705.48 254 1.77 0.17 0.70 0.20 0.10 375.00 71.01 0.391 36.69 ox 10 20 31 40 760 1003 145,431.22 255 1.45 0.24 0.47 0.36 0.17 375.00 94.50 0.165 17.50 00 30 42 90 90 760 1002 90,611.57 256 1.74 0.19 0.63 0.25 0.12 375.00 76.60 0.399 30.84 ox 12 21 2 51 3 760 1001 107,960.09 257 1.69 0.22 0.50 0.33 0.11 375.00 91.09 0.260 15.22 00 30 40 60 70 760 2002 63,251.17 259 1.27 0.19 0.60 0.27 0.13 375.00 04.27 0.211 17.52 ox 22 32 50 50 761 1002 102,987.01 259 1.20 0.19 0.53 0.31 0.16 375.00 87.24 0.063 19.94 ox 20 40 50 50 7 60 2002 74,944.57 260 21.59 0.27 0.72 0.19 0.09 375.00 67.77 0.560 16.70 ox 12 10 30 32 760 1000 25,571.30 261 1.45 0.22 0.57 0.30 0.13 375.00 00.09 0.454 26.52 ox 20 20 70 ox 760 1000 106,970.40 262 1.28 0.22 0.56 0.32 0.12 375.00 90.90 0.598 6.07 ox 20 20 90 102 762 2000 5,230.01 263 2.07 0.19 0.67 0.23 0.20 375.00 79.62 0.416 22.69 ox It 20 40 50 760 1001 99,941.09 264 2.52 0.16 0.70 0.20 0.09 375.00 73.33 0.504 2.52 00 10 20 42 40 760 10000 1,591.41 265 2.12 0.17 0.71 0.20 0.09 375.00 95.05 0.433 6.92 ox 10 20 31 40 760 1000 12,969.52 AVERAGE AVERAGE AVERAGE AVERAGE AVERAGE AVERAGE "Ss EP TIME OF 0 FINER SIZE (NO) VATERSHED S K I Ds& I 115i I DO) L CURVE 0 CURVE I COINCENTRATION 0.001 0.003 0.004 0.052 0.003 O.05 1.177 ACRES 266 1.26 0.10 0.03 0.25 0.11 375.00 93.01 0.220 29.65 02 10 21 50 60 762 1002 2060843.90 267 1.25 0.17 0.73 0.19 0.09 375.00 79.50 0.375 10.89 00 12 It 30 40 702 1002 50,223.34 268 1.19 0.17 0.72 0.19 0.09 375.00 78.83 0.305 21.37 ox It 10 31 40 712 1000 004,479.09 269 1.00 0.17 0.09 0.22 0.10 375.00 84.07 0.327 12.11 02 10 21 40 50 760 1000 29,040.79 270 1.43 0.19 0.67 0.23 0.10 375.00. 79.95 0.453 15.45 ox 10 21 40 50 760 1002 34,447.62 271 1.20 0.16 0.07 0,23 0.10 315.00 06.43 0.269 9.34 AZ 00 21 40 50 700 1000 50,906.53 272 1.22 0.16 0.74 0.19 0.00 375.00 77.78 0.384 10.04 00 It 10 31 31 760 10000 8,669.74 273 1.09 0.17 0.06 0.24 0.11 375.00 82.51 0.250 13.55 02 10 20 50 51 760 1002 23,110.05 274 1.05 0.10 0.67 0.23 0.10 375.00 78.49 0.383 14.17 ox It 2? 40 50 760 1000 32,727.71 275 1.20 0.16 0.08 0.22 0.10 375.00 90.13 0.350 17.00 00 10 20 40 50 760 fool 64,572.12 276 0.09 0.16 0.64 0.25 0.11 375.00 92.84 0.213 12.07 0% 12 20 50 60 760 0002 35,455.84 277 1.07 0.13 0.74 0.11 0.08 375.00 97.50 0.079 15.47 00 10 10 30 31 700 10000 70,703.99 278 1.21 0.13 0.69 0.22 0.10 375.00 93.11 0.116 18.15 00 12 20 40 ~ 40 700 1002 103,031.17 279 1.31 0.11 0.67 0.21 0.12 375.00 90.50 0.047 17.23 00 10 20 32 30 700 1000 37,373.90 280 1.15 0.19 0.53 0.32 0.14 375.00 95.55 0.232 0.80 ox 20 30 70 at 761 1000 306.42 UL APPENDIX C AVERAGE VALUES FOR EACH SOIL MAPPING UNIT 53 MAPPING TOTAL AVE % AVE AVE AVE AVE AVE AVE UNIT # MLRA ACRES SLOPE HSG ERODIBILITY SAND SILT CLAY LENGTH SC001 136 552,210 11.08 2.18 0.25 0.61 0.28 0.11 150.00 SC002 136 1,037,610 7.80 2.06 0.27 0.62 0.26 0.11 225.00 SC003 136 91,520 3.50 3.15 0.29 0.58 0.30 0.12 300.00 SC004 136 41,300 4.32 2.02 0.27 0.64 0.26 0.11 300.00 SC005 136 337,810 5.27 2.14 0.27 0.65 0.24 0,11 300.00 SC006 136 506,230 14.95 2.08 0.25 0.55 0.27 0.18 150.00 SC007 136 94,040 4.48 2.00 0.22 0.72 0.19 0.09 300.00 SC008 136 56,480 6.68 2.00 0.28 0.64 0.26 0.11 225.00 SC009 136 47,290 14.03 2.33 0.26 0.63 0.23 0.13 150.00 SCO10 136 95,580 11.54 2.77 0.26 0.62 0.25 0.13 150.00 SCO11 136 31,810 9.61 2.25 0.27 0.64 0.25 0.11 225.00 SC012 136 27,180 4.88 2.43 0.28 0.64 0.25 0.10 300.00 SC013 136 310,020 9.17 2.27 0.38 0.27 0.57 0.16 225.00 SC014 136 176.680 7.61 2.30 0.36 0.26 0.58 0.16 225.00 SC015 136 635,930 6.65 2.26 0.38 0.31 0.53 0.16 225.00 SC016 136 2,130 1.30 2.56 0.25 0.50 0.35 0.15 300.00 SC017 136 28,150 8.88 2.23 0.21 0.66 0.24 0.10 225.00 SC018 133A 91,950 3.12 1.77 0.12 0.80 0.13 0.07 375.00 SC019 137 285,140 5.15 1.15 0.11 0.86 0.09 0.05 375.00 8C020 136 22,460 12.79 2.05 0.20 0.69 0.16 0.15 150.00 SC021 136 2,760 14.73 2.28 0.19 0.69 0.21 0.10 150.00 SC022 136 113.550 15.66 2.31 0.24 0.63 0.25 0.12 100.00 SC023 136 61,790 5.25 2.30 0.23 0.71 0.19 0.10 300.00 t 6n SC024 136 15,090 5.36 2.33 0.25 0.63 0.18 0.19 300.00 SC025 136 222,980 17.20 2.76 0.27 0.58 0.27 0.15 100.00 SC026 136 7,780 16.08 2.26 0.29 0.45 0.30 0.25 100.00 SC027 136 26,590 6.74 2.04 0.28 0.57 0.26 0.17 225.00 SC028 136 8,210 13.68 2.10 0.27 0.45 0.30 0.25 150.00 SC029 136 49,770 4.57 2.00 0.26 0.62 0.26 0.11 300.00 SC030 136 116,000 17.41 2.13 0.25 0.49 0.29 0.22 100.00 SC031 136 61,530 13.54 2.00 0.22 0.62 0.24 0.14 150.00 SC032 136 22,530 12.57 2.59 0.25 0.60 0.24 0.16 150.00 SC033 136 52,440 10.08 2.00 0.26 0.63 0.21 0.16 150.00 SC034 SC035 136 351,640 21.47 2.92 0.24 0.62 0.24 0.13 100.00 SC036 136 56,310 18.26 2.87 0.25 0.62 0.25 0.13 100.00 SC037 136 280,710 11.63 2.28 0.24 0.60 0.24 0.16 150.00 SC038 136 22.050 15.85 2.20 0.22 0.65 0.22 0.13 100.00 SC039 136 107,540 7.86 2.03 0.26 0.61 0.17 0.22 225.00 SC040 136 101,390 24.03 2.10 0.22 0.65 0.25 0.10 100.00 SC041 136 4,880 9.36 2.83 0.27 0.53 0.30 0.16 225.00 SC042 136 42,480 8.59 2.43 0.27 0.56 0.28 0.16 225.00 SC043 136 294,080 10.17 2.11 0.25 0.55 0.28 0.17 150.00 SC044 130 105,640 19.98 2.47 0.22 0.62 0.27 0.11 100.00 SC045 130 74,040 38.31 2.52 0.22 0.59 0.29 0.12 100.00 SC046 136 207.050 23.11 2.08 0.24 0.57 0.28 0.15 100.00 SC047 137 40,720 5.24 1.40 0.10 0.87 0.08 0.05 375.00 SC048 136 22.440 5.87 2.96 0.22 0.61 0.26 0.13 300.00 SC049 137 330.820 6.13 1.73 0.12 0.82 0.11 0.06 250.00 SC050 137 204,B20 4.59 1.30 0.11 0.84 0.10 0.06 375.00 SC051 133A 62,662 5.55 1.96 0.13 0.79 0.14 0.07 375.00 SC052 137 145,720 5.90 1.59 0.12 0.84 0.10 0.06 375.00 SC053 137 87,348 6.29 1.66 . 0.13 0.82 0.12 0.07 250.00 MAPPING TOTAL AVE % AVE AVE AVE AVE AVE AVE UNIT # MLRA ACRES SLOPE HSG ERODIBILITY SAND SILT CLAY LENGTH SC054 137 38,210 9.15 2.72 0.15 0.77 0.16 0.08 250.00 SC055 153A 394,140 1.16 3.34 0.28 0.19 0.52 0.29 375.00 SC056 133A 68,865 1 0.22 0.01 0.05 0.05 0.02 375.00 SC057 137 26,220 6.86 2.14 0.12 0.83 0.11 0.06 250.00 SC058 133A 138,340 1.00 3.74 0.26 0.46 0.37 0.16 375.00 SC059 133A 63,470 2.08 2.20 0.18 0.70 0.21 0.09 375.00 SC060 133A 24,160 1.18 2.30 0.16 0.75 0.17 0.08 375.00 SC061 133A 146,270 2.25 2.15 0.18 0.72 0.19 0.09 375.00 SC062 133A 314,430 3.90 2.06 0.14 0.79 0.14 0.07 375.00 SC063 153A 290,650 1.12 3.62 0.18 0.51 0.34 0.15 375.00 SC064 133A 28,440 1.00 2.82 0.30 0.41 0.42 0.18 375.00 SC065 133A 10,920 1.00 3.75 0.26 0.44 0.36 0.20 375.00 SC066 137 344,560 5.12 1.78 0.11 0.84 0.10 0.06 375.00 SC067 137 125,136 7.01 2.40 0.12 0.81 0.12 0.07 375.00 SCOb68 137 53,520 3.94 1.70 0.11 0.84 0.10 0.06 375.00 SC069 133A 75.480 3.82 2.76 0.15 0.74 0.18 0.09 375.00 SC070 153A 66,300 1.30 2.74 0.17 0.72 0.19 0.09 375.00 SC071 153A 397,620 1.42 2.70 0.15 0.73 0.18 0.09 375.00 SC072 153A 74,680 1.33 2.56 0.16 0.72 0.19 .0.09 375.00 SC073 153A 10,040 1.00 3.67 0.21 0.67 0.21 0.13 375.00 SC074 153A 74,230 1.71 2.24 0.11 0.81 0.13 0.07 375.00 SC075 153A 582,470 1.27 2.52 0.17 0.72 0.19 0.09 375.00 SC076 153A 51,400 1.00 2.59 0.17 0.70 0.21 0.09 375.00 L1 SC077 153A 46,455 1 3.38 0.13 0.69 0.22 0.09 375.00 Ln SC078 1538 50,010 1.06 3.15 0.14 0.71 0.20 0.09 375.00 SC079 1538 161,798 1.12 2.67 0.12 0.81 0.13 0.08 375.00 SC080 1538 26,500 1.00 2.86 0.14 0.68 0.22 0.10 375.00 SC081 1538 517,790 1.18 3.55 0.16 0.64 0.25 0.11 375.00 SC082 1538 43,250 1.00 3.77 0.19 0.55 0.31 0.14 375.00 SC083 1538 334,240 0.92 4.00 0.08 0.23 0.49 0.28 375.00 SC084 1538 577,222 1 4.00 0.06 0.10 0.56 0.34 375.00 SC085 1538 8,600 12.40 1.40 0.10 0.88 0.07 0.05 150.00 SC086 1538 117,870 1.66 2.38 0.10 0.86 0.08 0.05 375.00 SC087 1538 32,920 1.18 3.26 0.15 0.66 0.23 0.11 375.00 SC088 1538 114,420 1.18 3.27 0.16 0.67 0.22 0.11 375.00 SC089 1538 140,780 1.00 3.92 0.25 0.49 0.36 0.15 375.00 8C090 1538 47,900 1.00 3.36 0.21 0.67 0.23 0.10 375.00 SC091 153A 136,868 1.27 3.04 0.12 0.76 0.16 0.08 375.00 SC092 153A 19,030 1.00 2.88 0.20 0.64 0.26 0.10 375.00 SC093 1538 29,850 1 4.00 0.37 0.10 0.57 0.34 375.00 SC094 1538 76,010 1.65 2.92 0.13 0.79 0.14 0.07 375.00 SC095 1538 91,610 1.09 2.10 0.11 0.85 0.10 0.06 375.00 SC096 1538 17,410 1.00 3.79 0.15 0.46 0.37 0.16 375.00 SC097 1538 452,620 1.12 2.95 0.15 0.73 0.18 0.09 375.00 SC098 1538 34,290 1.00 3.93 0.05 0.53 0.33 0.14 375.00 SC099 1538 4.460 1.00 3.77 0.17 0.47 0.37 0.16 375.00 SC100 153A 43,410 2.44 2.02 0.13 0.79 0.14 0.07 375.00 SC101 153A 79,420 1.24 3.57 0.24 0.50 0.35 0.15 375.00 SC102 153A 98,690 1.27 3.39 0.24 0.52 0.35 0.13 375.00 SC103 153A 8,540 1.00 3.71 0.17 0.57 0.29 0.13 375.00 SC104 133A 145,650 1.42 2.65 0.19 0.69 0.22 0.10 375.00 SC105 133A 27,140 1.99 2.32 0.13 0.75 0.17 0.08 375.00 SC106 1538 33,650 3.01 1.60 0.11 0.84 0.10 0.06 375.00 MAPPING TOTAL AVE % AVE AVE AVE AVE AVE AVE UNIT # MLRA ACRES SLOPE HSG ERODIBILITY SAND SILT CLAY LENGTH SC107 1558 68,690 1.06 2.10 0.14 0.80 0.13 0.07 375.00 SC108 153A 94.220 1.10 3.61 0.20 0.56 0.31 0.14 375.00 SC109 153B 460,500 1.00 3.82 0.17 0.62 0.27 0.11 375.00 SCIlO 153B 125,700 1.06 3.16 0.15 0.66 0.24 0.10 375.00 SCliI 153A 96,890 1.45 2.35 0.18 0.75 0.17 0.08 375.00 SC112 153A 109,530 1.09 2.68 0.16 0.73 0.18 0.08 375.00 SC113 153A 346,110 1.62 2.43 0.17 0.70 0.21 0.09 375.00 SC114 153A 29527.4 3.33 1.45 0.12 0.85 0.10 0.06 375.00 SC15 133A 98,760 2.91 2.03 0.13 0.78 0.15 0.07 375.00 SC116 133A 58,670 1.27 2.47 0.17 0.71 0.20 0.09 375.00 SC117 133A 133,760 3.90 2.00 0.13 0.83 0.11 0.06 375.00 SCl18 1538 174,140 1.00 3.81 0.17 0.64 0.25 0.10 375.00 SC119 153A 41,900 1.00 2.54 0.12 0.82 0.11 0.06 375.00 SC120 1538 60,780 1.73 2.94 0.22 0.71 0.20 0.09 375.00 SC121 137 102.670 3.50 1.84 0.14 0.76 0.16 0.08 375.00 SC122 1538 43,470 1.06 3.85 0.12 0.60 0.28 0.12 375.00 SC123 153A 25.340 1.57 2.76 0.19 0.66 0.24 0.10 375.00 SC124 153A 64,960 1.00 3.29 0.33 0.34 0.50 0.16 375.00 SC125 153B 21,310 1.57 3.09 0.16 0.68 0.21 0.11 375.00 SC126 1538 73,030 1.48 2.83 0.14 0.80 0.13 0.07 375.00 SC127 1538 14,355 3.46 1.87 0.19 0.69 0.15 0.16 375.00 SC128 1538 71,190 1.84 2.74 0.17 0.69 0.21 0.10 375.00 SC129 1538 56,790 1.24 3.31 0.16 0.73 0.18 0.09 375.00 Ltn SC130 133A 151,620 3.28 1.94 0.14 0.78 0.14 0.08 375.00 SC131 153A 8,530 1.75 2.79 0.13 0.77 0.15 0.08 375.00 SC132 133A 9,530 1.84 2.96 0.20 0.69 0.22 0.09 375.00 SC133 133A 56,500 1.00 3.84 0.24 0.54 0.32 0.14 375.00 SC134 153A 5,880 0.80 3.55 0.04 0.83 0.11 0.06 375.00 SC135 133A 466,110 2.01 2.30 0.14 0.76 0.16 0.08 375.00 SC136 133A 53,840 1.00 4.00 0.19 0.49 0.36 0.16 375.00 SC137 133A 53,010 8.22 2.17 0.14 0.81 0.13 0.07 250.00 SC138 133A 33,210 2.40 2.23 0.15 0.77 0.16 0.08 375.00 SC139 133A 369,390 1.30 2.28 0.18 0.70 0.21 0.09 375.00 SC140 137 33,570 5.79 2.26 0.15 0.73 0.18 0.09 375.00 SC141 137 50,370 6.00 1.84 0.14 0.80 0.13 0.07 375.00 SC142 133A 104,440 2.56 2.46 0.17 0.72 0.19 0.09 375.00 SC143 133A 16,370 1.00 3.09 0.30 0.28 0.50 0.23 375.00 SC144 133A 16,611 2.32 2.33 0.20 0.69 0.21 0.10 375.00 SC145 133A 43,480 3.71 2.34 0.19 0.75 0.17 0.08 375.00 SC146 136 10,595 9.02 2.47 0.34 0.38 0.47 0.15 225.00 SC147 137 84,080 4.71 1.96 0.15 0.80 0.13 0.07 375.00 SC148 137 222,410 5.69 1.52 0.12 0.85 0.09 0.06 375.00 SC149 137 16.840 7.87 2.58 0.12 0.72 0.19 0.09 250.00 SC150 153A 22,290 1.48 1.55 0.13 0.79 0.14 0.07 375.00 SC151 153A 9,450 1.00 4.00 0.19 0.66 0.24 0.10 375.00 SC152 153A 71,540 1.78 2.21 0.16 0.74 0.18 0.08 375.00 SC153 153A 78.290 1.15 2.10 0.13 0.81 0.12 0.07 375.00 SC154 153A 33.040 1.84 2.49 0.22 0.71 0.20 0.09 375.00 SC155 153A 38,350 1.72 2.29 0.11 0.80 0.13 0.07 375.00 SC156 153A 30,200 2.14 1.22 0.13 0.84 0.10 0.06 375.00 SC157 153A 54,350 2.74 1.88 0.12 0.83 0.11 0.06 375.00 SC158 136 92,169 56.21 2.31 0.23 0.62 0.27 0.11 100.00 SC159 - MAPPING TOTAL AVE % AVE AVE AVE AVE AVE AVE UNIT # MLRA ACRES SLOPE HSG ERODIBILITY SAND SILT CLAY LENGTH SC160 153A 3,010 1.36 3.06 0.15 0.76 0.16 0.08 375.00 APPENDIX D LAND USE BY WATERSHED 58 FORESTED UNFORMSED URBAN AGRICULTURE PASTURELAND FOREST W ATER WETLANDS WETLANDS B ARE TOTAL WATERSHED I CAT I UNIT I (ACRES) (ACRES) I ACRES) I (ACRES) 2 (ACRES) I (ACRES) I (ACRES) 1 ACRES) I ACRES) 1 3060102 30 a 0.00 0 0.00 0 0.00 (5,222 95.18 69 0.43 0 0.00 0 0.00 702 4.39 15,993 2 3060102 60 a 0.00 5,911 9.91 0 0.00 52,774 881.50 603 1.01 0 0.00 159 0.27 188 0.31 59,633 3 3060102 120 I ,49 2.09 6,109 8.52 0 0.00 63,123 88.01 227 0.32 0 0.00 0 0.00 771 1.07 71,722 4 3060102 130 0,661 3.37 14,382 29.18 0 0.00 24,306 49.32 6,623 13.44 0 0.00 0 0.00 2,313 4.69 49,204 5 3060102 150 1,019 2.78 22,250 60.84 0 0.00 9,035 26.89 3,469 9.49 0 0.00 0 0.00 0 0.00 36,573 6 3060101 20 257 0.64 0 0.00 0 0.OA 32,382 80.97 7,354 1D.39 0 0.00 0 0.00 0 0.00 39,993 7 3060101 50 6,741 6.36 11,664 11.00 0 0.00 76,921 72.56 9,331 08.0 0 0.00 0 0.00 1,354 1.28 006,012 8 3060101 so 5,950 9.48 25,838 41.17 0 0.00 29,792 47.46 524 0.83 0 0.00 0 0.00 662 1.06 62,767 9 3060101 40 17,446 12.55 4 3,541 31.33 A 0.00 59,890 43.09 16,774 12.07 0 0.00 0 0.00 1,344 0.97 138,996 10 3060101 30 366 0.48 7,987 10.48 0 0.00 61,413 80.57 6,395 8.39 0 0.00 0 0.00 59 0.08 76,220 11 3060101 70 7,651 24.71 4,932 15.93 0 0.00 17,466 56.42 30 0.10 0 0.00 0 0.00 880 2.04 30,958 12 3060101 6R 7,641 (0.10 24,751 32.71 0 0.00 42,405 56.04 336 0.44 0 0.00 0 0.00 534 0.71 75,666 13 3060101 90 4,903 11.22 19,690 45.07 0 0.00 19,048 43.60 A 0.00 0 0.00 0 0.00 49 0.11 43,690 14 3060101 too 1,641 3.24 30,009 59.25 0 0.00 18,326 36.17 366 0.72 0 0.00 0 0.00 3)6 0.62 50,668 Is 3060103 20 79 0.64 6,623 33.56 0 0.00 2,837 22.94 2,827 22.86 0 0.00 0 0.00 0 0.00 12,366 16 3060103 30 11,801 8.56 48,523 34.95 0 0.00 77,920 56.12 465 0.33 0 0.00 0 0.00 49 0.04 138,838 17 3060003 go 959 3.26 13,977 47.48 0 0.00 1 4,006 47.50 494 1.68 0 0.00 0 0.00 0 0.00 29,436 to 3060103 70 10,675 8.17 69,627 53.20 0 0.00 49,215 37.66 1,058 0.81 0 0.00 0 0.00 109 0.08 130,683 19 3060103 100 1,226 1.30 3,460 3.66 0 0.00 71,386 75.43 10,375 19.42 0 0.00 0 0.00 188 0.20 94,635 20 3060103 140 5,436 2.49 72,078 33.06 0 0.00 1 37,761 63.18 1,404 0.64 109 0.05 0 0.00 1,245 0.57 218,033 21 3060103 150 3,400 2.45 20,191 20.28 0 0.00 106,664 76.73 544 0.39 0 0.00 0 0.00 2 08 0.15 139,006 Ul 22 3060107 10 2,600 0.60 21,449 13.22 0 0.00 1 37,790 84.92 99 0.06 0 0.00 0 0.00 316 0.19 162,255 23 30600107 20 1,453 0.97 23,565 15.60 0 0.00 121,965 81.15 120 0.09 0 0.00 0 0.00 3,183 2.12 1 50,294 24 3060107 30 1,107 4.02 4,497 16.33 0 0.00 21,045 79.33 89 0.32 0 0.00 0 0.00 0 0.00 27,538 25 3060107 40 455 0.31 10,132 7.00 0 0.00 132,660 91.61 642 0.44 0 0.00 0 0.00 030 0.57 144,720 26 30holR6 30 5,160 17.33 1,334 4.48 0 0.00 20,184 67.80 2,906 9.76 0 0.00 0 0.00 ISO 0.63 29,772 27 3060106 50 13,067 12.80 8,283 8.11 0 0.00 76,902 75.31 751 0.74 79 0.08 0 0.00 3,025 2.96 102,107 28 3060106 60 4,053 3.33 2 8,527 23.46 0 0.00 65,030 53.47 2,750 2.27 1 8,543 15.25 49 0.04 2,649 2.10 121,609 29 3060106 100 1,611 1.13 12,257 8.62 109 0.00 (110,903 78.71 395 0.28 8,511 5.99 0 0.00 7,394 5.20 142,179 30 3060006 110 1,473 1.63 5,476 6.05 0 0.00 62,391 60.91 2,283 2.52 18,356 20.27 237 0.26 326 0.36 90,542 31 3060106 130 623 0.55 30,326 26.64 573 0.50 68,400 60.16 3,044 2.67 9,508 8.42 69 0.06 1,127 0.99 113,830 32 3060106 140 59 0.08 22,230 31.07 0 0.00 27,766 381.81 0,81 2.54 1 9,206 26.84 316 0.44 1 48 0.21 71,544 33 3060109 20 217 0.22 21,746 21.06 49 0.05 37,532 37.73 4,270 4.29 35,604 35.79 40 0.04 20 0.02 99,478 34 3060109 so 356 0.44 13,651 17.03 1,236 1.54 31,255 38.99 346 0.43 33,173 41.39 0 0.00 138 0.17 80,154 35 306010 60 741 1.80 1,364 3.46 0 0.00 10,063 27.53 3,341 8.47 7,453 18.09 15,015 38.05 602 1.73 39,459 36 3050208 so 2,303 2.58 39,805 44.59 0 0.00 22,092 24.75 425 0.48 24,524 27.47 10 0.01 009 0.12 89,267 37 3050208 60 1,117 2.16 30,138 50.32 0 0.00 4,705 9.10 257 0.50 15,440 29.08 20 0.04 0 0.00 51,676 30 3050208 so 287 0.39 27,608 37.94 0 0.00 20,605 39.42 59 0.00 1 4,995 20.61 0 0.00 0,137 1.56 72,770 39 3050208 120 1,077 1.86 14,323 24.79 2,530 4.30 14,125 24.45 10 0.02 24,988 43.25 0 0.00 722 1.25 57,775 40 3050208 130 1,463 1.52 9,153 9.53 3,410 3.55 40,833 42.53 2,501 2.60 25,383 26.44 1 2,978 13.52 287 0.30 96,009 41 3050208 140 385 1.27 2,511 8.29 0 0.00 11,644 30.43 2,026 6.69 959 3.16 12,642 41.73 120 0.42 30,296 42 305020B 110 6,356 9.03 4,053 5.76 0 0.00 12,217 17.35 8,352 11.86 14,787 21.00 23,258 33.03 1,384 1.97 70,408 43 3050208 90 6,079 2.52 51,449 21.32 1,354 0.50 83,534 31.62 16,349 6.78 36,217 15.01 44,500 18.44 1,769 0.73 241,291 44 3050208 too 13,759 9.17 27,400 10.28 0 0.00 17,090 (1.40 1 7,209 11.40 9,796 6.53 63,805 42.57 850 0.57 1 49,899 45 3050208 10 2,867 1.31 43,690 19.91 484 0.22 76,042 34.65 9,560 4.36 38,836 17.70 46,833 21.34 1,156 0.53 219,476 46 3050200 40 30 0.05 6,366 11.41 287 0.51 12,050 21.80 3,064 5.49 12,217 21.90 21,657 38.83 0 0.00 55,770 47 3050208 20 5,496 5.32 26,659 25.80 0 0.00 45,489 44.03 297 0.29 22,893 22.16 850 0.82 1,641 1.59 1 03,323 48 3050208 30 425 0.44 20,303 20.04 405 0.42 47,436 48.70 119 0.02 26,748 27.46 1,967 2.02 10 0.01 97,412 49 3050208 70 1,730 2.60 21,094 31.76 30 0.04 29,189 43.94 30 0.04 13,700 20.63 99 0.15 554 0.83 66,424 50 3050207 10 1,295 2.47 1 0,593 35.49 59 0.00 26,402 50.40 652 1.25 5,268 10.06 0 0.00 119 0.23 52,388 51 3050207 20 1,245 7.45 8,806 53.13 0 0.00 4,003 23.94 048 0.89 2,441 14.60 0 0.00 0 0.00 16,725 52 3050207 30 662 0.59 55,699 49.80 306 0.27 34,240 30.61 227 0.20 20,639 18.45 69 0.06 10 0.01 100,853 FORESTED UNFORESTED URBAN ASRICULTUORE PASTURELAND FOREST W ATER WETLANDS WETLANDS BARE TOTAL WATERSHED I CAT I UNIT I (ACRES) % (ACRES) I (ACRES) I (ACRES) I (ACRES) I (ACRES) I (ACRES) I (ACRESI z (ACRESI 53 3050207 50 1,090 1.93 57,755 S9.19 139 0.14 22,991 23.56 306 0.31 14,323 14.69 0 0.00 lea 0.19 97,590 54 3050207 40 336 0.31 39,024 36.44 0 0.00 35,634 33.27 178 0.17 31,9009 29.70 99 0.09 20 0.02 007,099 55 3050207 60 761 1.04 38,392 52.25 0 0.00 25,512 34.73 217 0.30 9,412 11.49 0 0.00 168 0.23 73,452 56 3050207 70 178 0.46 13,107 33.77 0 0.00 1 5,865 40.87 40 0.00 9,539 24.57 99 D.23 0 0.00 39,817 57 3050207 100 99 0.29 13,730 39.61 0 0.00 15,925 45.65 0 0.00 5,011 14.46 0 D.00 0 0.00 34,665 59 3050207 so 0 0.00 15,647 36.25 0 0.00, 11,940 41.56 0 0.00 9,578 22.19 0 0.00 N O0.00 43,166 59 3050207 90 257 0.50 15,222 29.57 0 0.00 32,747 63.61 69 0.13 3,193 6.19 0 0.00 0 0.00 51,479 60 3050207 110 0 0.00 16,735 35.36 0 0.00 12,356 26.11 0 0.00 19,179 39.41 0 0.00 59 0.13 47,327 61 3050204 20 3,212 3.34 30,970 32.21 0, 0.00 49,919 51.79 149 0.15 7,967 9.29 0 0.00 4,063 4.22 96,18 62 3050204 10 1,216 0.95 39,795 27.97 0 0.00 87,745 61.67 326 0.23 11,120 7.82 30 0.02 2,056 1.44 142,2899 63 3050204 30 959 1.22 28,923 36.74 79 0.10 36,968 47.12 103 0.19 11,496 14.64 0 0.00 0 0.00 79,454 64 3050204 40 1,147 2.83 16,764 41.44 0 0.00 1 6,596 41.02 59 0.15 5.991 14.56 0 0.00 0 0.00 40,457 65 3050204 60 59 0.23 15,548 59.45 0 0.00 6,030 23.05 0 0.00 4,517 17.27 0 0.00 0 0.00 26,154 66 3050204 ID 59 0.25 13,463 56.42 0 0.00 5,466 22.91 217 0.91 4,656 19.51 0 0.00 0 0.00 23,861 67 3050204 50 4,339 2.53 93,369 54.44 0 0.00 40,949 20.54 178 0.10 24,672 14.39 0 0.00 0 0.00 171,507 68 3050203 to 633 1.16 13,394 24.49 751 1.37 37,423 69.43 316 0.59 2,165 3.96 0 0.00 to 0.02 54,691 69 3050203 30 395 0.93 9,649 20.04 0 0.00 29,990 72.02 128 0.31 2,412 5.91 0 0.00 40 0.00 41,505 70 3050203 20 692 1.09 14,422 22.63 40 0.06 43,363 69.06 474 0.74 4,547 7.14 0 0.00 179 0.20 63,716 7.1 3050203 40 2,679 2.19 50,391 41.13 0 0.00 59,979 49.97 1 48 0.12 9,153 7.47 a 0.00 149 0.12 122,4899 72 3050203 50 731 1.32 24,405 44.15 0 0.00 26,699 48.30 138 0.25 3,163 5.72 0 0.00 139 0.25 55,274 Yl 73 3050203 60 1,473 2.57 23,802 41.55 0 0.00 22,922 40.01 257 0.45 0 ,837 15.42 0 0.40 0 0.00 57,291 74 3050203 ID 5,199 10.13 17,328 33.02 0 0.00 25.938 50.43 435 0.85 2,115 4.13 0 0.80 326 0.64 51,232 75 MOM20 90 4,410 7.50 22,459 39.13 0 0.00 1 6,112 27.36 59 0.10 15,945 26.91 0 0.00 0 0.00 58,892 76 3050205 10 593 0.64 1 7,417 19.90 I 0.00 45,587 49.47 149 0.16 20,300 30.91 20 0.02 0 0.00 92,154 77 3050205 20 0 0.00 12,573 34.28 0 0.00 7,710 21.02 0 0.00 16,398 44.70 0 0.00 0 0.00 36,682 79 3050205 30 129 0.29 6,969 05.90 0 0.00 24,543 55.99 89 0.20 11,328 25.04 209 0.47 573 1.31 43,839 79 3050205 40 1,048 1.02 37,069 37.00 0 0.00 50,293 49.15 0 0.00 12,267 II.99 0 0.00 860 0.84 102,335 90 3050205 50 0 0.00 1,344 9.48 0 0.00 8,590 60.56 0 0.00 4,250 21.97 0 0.00 0 0.00 04,094 81 3050205 60 1,236 0.79 17,940 11.54 79 0.05 56,946 36.55 9,155 5.24 41,090 26.42 29,426 18.92 741 0.48 155,513 82 3050205 70 1,868 1.73 35,703 33.00 1 48 0.14 22,220 20.54 9,707 8.97 6,801 6.29 31,077 29.73 652 0.60 108,076 93 3050206 10 1,819 3.34 32,392 59.54 0 0.00 10,824 19.99 306 0.56 9,064 16.66 0 0.00 0 0.00 54,405 04 3050206 20 2,64? 3.02 36.098 52.11 0 0.00 19,099 26.11 200 0.30 12,168 17.57 0 0.00 59 0.09 69,271 as 3050206 30 1,245 2.45 23,842 46.95 0 0.00 21,736 42.72 49 0.10 4,013 7.99 0 0.00 0 0.00 50,996 96 3050206 40 2,066 3.04 21,173 32.20 0 0.00 20,204 30.72 069 0.26 21,094 32.06 0 0.00 1,069 1.62 65,762 97 3050206 50 0 0.00 13,295 65.42 0 0.00 4,250 20.91 49 0.24 2,283 11.24 0 0.00 445 2.19 20,323 Be 3050206 55 109 0.79 8,728 63.39 8 0.00 4,606 33.45 0 0.00 048 1.08 0 0.00 178 1.29 13,769 89 3050206 60 068 0.24 22,804 32.02 0 0.00 37,611 52.82 40 0.06 00,547 14.91 0 0.00 40 0.06 71,209 90 3050206 70 1,957 2.13 1 8,227 19.87 405 0.44 50,499 56.13 277 0.30 1 9,216 20.94 0 0.00 168 0.19 91,749 91 3050202 to 899 O.99 11,229 12.37 959 1.06 64,704 71.30 119 0.13 12,613 13.90 0 0.00 227 0.25 90,750 92 3050202 20 4,774 6.76 11,654 16.51 0 0.00 39,261 55.63 712 1.01 12,484 17.69 59 0.09 1,631 2.31 70,576 93 3050202 30 3,578 15.26 1,641 7.00 0 0.00 13,314 56.79 109 0.51 4,053 17.20 0 0.00 741 3.16 23,446 94 3050202 40 14,659 31.57 0800 1.89 0 0.00 109,613 40.08 3,341 7.19 3,025 6.51 4,715 10.15 1,206 2.60 46,430 95 3050202 50 7,670 5.25 13,285 9.09 I II 0.12 55,225 37.77 2,016 1.30 56,500 39.64 1 0,547 7.21 791 0.54 146,212 96 3050202 60 2,096 2.76 4,090 4.00 0 0.00 27,914 26.66 12,000 00.46 5,962 5.60 50,727 48.46 1,107 1.06 1 04,657 97 3050202 70 5,308 9.00 12,712 21.56 0 0.00 9,105 13.74 4,112 6.97 6,178 10.48 21,647 36.71 909 1.54 58,971 98 3050200 to 4,013 4.06 7,542 7.64 0 0.00 20,966 21.13 53,554 54.23 11,575 11.67 1,255 1.27 a 0.00 98,756 99 3050201 20 297 0.41 8 ,936 12.31 0 0.00 40,566 55.09 49 0.07 22,616 31.15 128 0.08 0 0.00 72,592 000 3050201 30 0 99 1.99 5,911 13.09 0 0.00 29,913 63.80 1,919 4.03 366 0.91 6,909 15.30 445 0.99 45,162 101 3050201 40 425 0.41 2,382 2.27 0 0.00 91,785 79.03 209 0.20 1 4,085 13.44 5,476 5.22 455 0.43 1 04,816 102 3050201 50 9,214 16.74 3,025 6.16 0 0.00 22,102 45.04 3,311 6.75 49 0.10 11,960 24.39 405 0.83 49,067 103 3050201 60 3,717 7.16 2,787 5.37 0 0.00 33,143 63.94 1,295 2.49 4,616 9.99 5,140 9.90 1,216 2.34 51,914 104 3050201 70 12,286 30.33 731 1.81 0 0.00 18,662 46.07 1,493 3.68 3,579 8.83 3,232 7.99 524 1.29 40,507 FORESTED UINFORESTED URBAN AGRICULTURE PASTURELAND F O REST MATER W ETLANDS W ETLANDS P ARE TOTAL WATERSHED I CAT I UNIT I (ACRES) I [ ACRES) I (ACRES) I (ACRES) I (ACRES) t (ACRES) 2 (ACRES) % (ACRES) I (ACRES) 105 3050201 so 2,402 3.65 6,919 10.52 0 0.00 39,172 59.54 4,517 6.87 2,096 3.19 10,685 16.24 0 0.00 65,791 106 3050109 10 1,077 2.27 6,257 13.16 0 0.00 39,192 82.42 1,028 2.16 0 0.00 0 0.00 0 0.00 47,555 107 3050109 20 2,135 2.45 7,937 9.12 0 0.00 76,012 07.39 484 0.56 0 0.00 0 0.00 415 0.49 86,984 109 305D109 30 0 0.00 4,369 15.00 0 0.00 24,761 95.00 0 0.00 0 0.00 0 0.00 0 0.00 29,130 109 3050109 40 19,057 20.12 2B,112 29.67 0 0.00 45,09 47.60 425 0.45 0 0.00 0 0.00 2,046 2.16 94,733 tic 3050109 50 4,517 21.10 6,425 30.01 0 0.00 10,260 47.92 69 0.32 0 0.00 0 0.00 138 0.65 21,4100 III 3050209 60 4,072 15.08 11,970 46.67 0 0.00 9,558 37.26 0 0.00 0 0.00 0 0.00 49 0.19 25,650 112 3050109 70 2,343 20.36 4,725 41.07 0 0.00 4,181 36.34 257 2.23 0 0.00 0 0.00 0 0.00 11,506 113 3050109 so 7,404 4.15 40,873 22.90 0 0.00 121,016 67.01 9,064 5.08 0 0.00 0 0.00 119 0.07 178,475 114 3050109 90 1,720 5.88 15,776 53.97 0 0.00 11,674 39.94 0 0.00 0 0.00 0 0.00 59 0.20 29,229 115 3050109 too 38,194 51.76 12,099 16.38 0 0.00 22,220 30.11 99 0.13 0 0.00 0 0.00 1,186 1.61 73,7800 016 3050109 110 1,900 7.66 14,105 56.67 0 0.00 0,580 34.47 297 1.19 0 0.00 0 0.00 0 0.00 24,809 117 3050109 120 642 0.95 22,893 33.90 0 0.00 43,334 64.14 692 1.02 0 0.00 0 0.00 0 0.00 67,561 (09 3050109 1 30 2,115 2.36 37,275 41.65 0 0.00 50,105 55.99 0 0.00 0 0.00 0 0.00 0 0.00 89,505 119 3050109 140 13,769 13.48 23,159 22.67 0 0.00 65,090 63.70 119 0.12 0 0.00 0 0.00 40 0.04 102,176 120 3050109 150 5,289 3.11 62,253 36.67 0 0.00 99,636 59.69 2,096 1.23 0 0.00 0 0.00 514 0.30 169,787 121 3050109 160 6,662 8.32 26,739 33.38 0 0.00 46,704 59.30 0 0.00 0 0.00 0 0.00 0 0.00 90,104 122 3050109 163 336 0.46 22,902 31.44 0 0.00 49,472 67.92 0 0.00 0 0.00 0 0.00 128 0.18 72,839 123 3050109 170 1,759 1.15 69,854 45.94 119 0.09 78,641 51.61 1,572 1.03 326 0.21 0 0.00 119 0.09 152,390 124 3050109 too 3,924 5.71 24,099 35.09 0 0.00 36,731 53.49 99 0.04 3,717 5.41 69 0.10 30 0.04 68,669 125 3050109 Iva 7,919 4.83 32,975 20.39 0 0.00 91,903 50.64 37,057 22.91 0 0.00 0 0.00 1,997 1.23 161,751 a' 126 3050109 200 120 0.94 4,171 30.54 0 0.00 9,341 60.38 20 0.14 0 0.00 0 0.00 0 0.00 13,610 127 3050109 210 20,609 32.94 8,689 13.99 a 0.00 31,383 50.17 1,360 2.18 0 0.00 0 0.00 514 0.82 62,559 129 3050100 00 30,939 18.10 73,363 42.94 a 0.00 65,277 38.21 149 0.09 0 D.00 0 0.00 1,117 0.65 1 70,844 129 3050100 20 2,441 3.37 10,705 14.79 0 0.00 5 9,070 901.62 0 0.00 0 0.00 0 0.00 119 0.22 72,375 130 3050109 30 1,077 3.05 16,992 49.03 0 0.00 1 6,922 47.96 227 0.64 0 0.00 0 0.00 148 0.42 35,337 131 3050109 40 5,328 7.76 16,942 24.69 0 0.00 46,072 67.10 227 0.33 0 0.00 0 0.00 99 0.13 69,658 132 3050000 43 801 3.25 2,511 10.20 0 0.00 21,291 86.54 0 0.00 0 0.00 0 0.00 0 0.00 24,603 033 3050009 50 4,646 3.87 17,446 04.33 0 0.00 97,799 81.46 89 0.07 0 0.00 0 0.00 79 0.07 (20,059 134 3050107 to 11,357 9.84 49,215 42.64 0 0.00 53,999 46.78 593 0.51 0 0.00 0 0.00 267 0.23 115,422 135 3050107 20 4,033 15.17 9,934 37.36 0 0.00 11,743 44.16 435 1.64 0 MD0 0 0.00 445 1.67 26,589 136 3050107' 30 4,409 16.62 8 ,145 30.70 0 0.00 1 3,947 52.57 0 0.00 8 0.00 0 0,00 30 0.11 26,530 137 3030107 40 5,516 8 .37 20,093 43.02 0 0.00 30,099T 46.97 425 0.64 0 0.00 0 0.00 198 0.30 65,930 139 3050107 50 1,305 0.95 29.250 19.03 0 0.00 122,906 79.86 415 0.27 0 0.00 0 0.00 0 0.00 153,784 139 3050107 60 19,186 12.26 34,082 21.77 0 0.00 102,473 65.47 366 0.23 0 0.00 0 0.00 415 0.27 156,522 140 3050105 155 1,315 4.29 1 5,163 49.49 0 0.00 1 4,135 46.13 30 0.00 0 0.00 0 0.00 0 0.00 30,642 141 3050105 160 3,915 6.37 31,472 52.54 0 0.00 22,794 38.05 1,631 2.72 0 0.00 0 0.00 189 0.31 59,900 142 3050105 ISO 20,976 34.82 21,529 35.91 0 0.00 1 6,992 28.34 30 0.05 0 0.00 0 0.00 524 0.97 59,950 143 3050105 170 5,713 6.74 42,998 50.75 0 0.00 35,8990 42.36 1 09 0.13 0 0.00 0 0.00 to 0.01 84,720 144 3050105 58 30 0.49 3,914 64.39 0 0.00 2,135 35.12 0 0.00 0 0.00 0 0.00 0 0.00 6,079 145 3050105 94 1 ,591 1.69 23,921 25.47 0 0.00 65,960 70.22 2,362 2.51 99 0.11 0 0.00 0 0.00 93,933 146 3050105 010 1,374 9.10 9,153 60.60 0 0.00 4,250 20.19 306 2.03 0 0.00 0 0.00 0 0.00 15,004 14? 3050105 130 5,436 5.47 30,504 30.68 0 0.00 62,727 63.00 385 0.39 297 0.29 0 0.00 99 0.10 99,439 104 3050105 lot 1,700 11.18 4,211 27.60 0 0.00 0.975 59.00 0 0.00 1 09 0.71 0 0.00 217 1.43 15,212 141 3050105 122 139 0.52 3.005 11.26 0 0.00 23,476 97.96 0 0.00 0 0.00 0 0.00 69 0.26 26,688 150 3050105 142 474 0.61 70.105 26.00 0 MD0 56,700 73.33 49 0.06 0 0.00 0 0.00 0 0.00 77,337 050 3050105 190 2,590 3.20 25,275 31.21 0 0.00 32,793 65.20 217 0.27 0 0.00 0 Q.00 99 0.12 8 0,974 152 3050101 190 3,925 7.95 11,9`90 24.93 0 0.00 27,746 57.69 3,430 7.13 0 0.00 0 0.00 1,107 2.30 49,090 153 3050101 200 1,245 3.06 16,725 41.04 0 0.00 21,924 53.80 603 0.49 0 0.00 0 0.00 257 0.63 40,754 054 305D006 la 761 0.94 10,270 12.64 0 0.00 67,432 83.02 2,758 3.40 0 0.00 0 0.00 0 0.00 81,221 155 3050106 20 590 0.97 23,812 24.40 0 0.00 72,909 74.72 0 0.00 0 0.00 0 0.00 0 0.00 97,510 156 3050106 30 1,008 5.35 6,583 08.66 0 0.00 26,520 75.15 1 19 0.34 0 0.00 0 0.00 179 0.50 35,288 FORESTED UNFORESTED URBAN AGRICULTUORE PASTURELAND FOREST WATER WETLANDS WETLANDS R ARE TOTAL. WATERSHED N CAT I UNIT I (ACRES) I (ACRES) % (ACRES) % (ACRES) I (ACRES) t (ACRES) I (ACRES) % (ACRES) I (ACRESI 157 3050106 40 4,419 4.20 12,553 12.15 0 0.00 95,936 93.19 405 0.39 0 0.00 0 0.00 0 0.00 103,313 159 3050106 50 2,947 1.91 23,594 14.96 0 0.00 119,949 76.09 10,003 6.34 0 0.00 702 0.45 573 0.36 157,668 159 3050106 60 30,999 19.12 12,969 9.00 10 0.01 113,040 69.72 3,311 2.04 0 0.00 0 0.00 1,799 1.11 162,126 lA0 3050106 70 435 0.36 10,429 9.63 0 0.00 109,560 90.67 119 0.10 0 0.00 0 0.00 297 0.25 120,939 161 3050(06 so 2,857 7.24 6,692 16.95 0 0.00 29,505 74.76 t oo 0.49 0 0.00 0 0.00 227 0.59 39,469 162 305010S 90 1,463 2.36 5,950 9.61 0 0.00 54,493 ST.99 0 0.00 0 0.00 0 0.00 30 0.05 61,937 163 3050103 to 15,579 15.70 11,733 11.92 0 0.00 67,333 67.84 4,003 4.03 0 0.00 0 0.00 603 0.61 99,251 164 3050103 29 2,254 7.719 7,099 27.27 0 0.00 19,395 63.60 179 0.62 0 0.00 0 0.00 200 0.72 28,922 165 3050103 39 119 0.49 7,700 31.31 0 0.00 16,715 67.07 0 0.00 10 0.04 0 0.00 49 0 .20 24,593 166 3050103 50 465 1.69 15,459 56.12 0 0.00 11,496 41.73 129 0.47 0 0.00 0 0.00 0 0.00 27,549 167 3050103 60 11,604 9.04 59,030 40.90 0 0.00 70,141 49.57 1,957 1.36 0 0.00 0 0.00 1,670 1.16 144,403 169 3050103 70 524 3.33 5,476 34.00 0 0.00 9,301 59.11 59 0.39 0 0.00 a 0.00 376 2.39 15,736 169 3050103 90 4,695 3.34 35,950 25.55 0 0.00 98,727 70.16 356 0.25 0 0.00 0 0.00 999 0.71 140,726 170 3050103 42 12,731 9.73 37,196 28.42 0 0.00 79,155 60.49 1,216 0.92 0 0.00 0 0.00 593 0.45 130,991 171 3050103 so 149 0.66 4,092 10.19 0 0.00 19,149 90.99 0 0.00 0 0.00 0 0.00 59 0.26 22,439 172 3050104 10 5,417 2.99 13,216 7.03 0 O.00 157,886 94.00 10,596 5.64 227 0.12 0 0.00 623 0.33 197,964 173 3050104 20 too 0.49 5,219 13.22 0 0.00 33,024 03.67 247 0.63 287 0.73 0 0.00 504 1.28 39,469 074 3050104 30 10,240 4.40 59,210 25.00 0 0.00 99,495 30.43 791 0.34 73,155 31.42 0 0.00 979 0.42 232,960 175 3050104 40 267 R.39 7,463 16.54 0 0.00 37,393 92.87 0 0.00 0 0.00 0 0.00 0 0.00 45,113 176 3050104 50 30 0.09 7,423 19.90 0 0.00 31,957 00.93 79 0.20 0 0.00 0 0.00 0 0.00 39,499 177 3050104 60 3,717 4.65 15,054 18.94 731 0.92 56,055 70.17 257 0.32 3,104 3.99 0 0.00 969, 1.21 79,987 1' 70 3050104 70 2,501 5.73 15,044 34.45 0 0.00 24,900 56.79 326 0.75 939 2.15 0 0.00 59 0.14 43,670 (a 179 3050104 so 544 1.25 20,312 46.84 0 0.00 15,015 34.57 109 0.25 6,623 15.25 0 0.00 901 1.04 43,433 too 3050104 90 1,354 2.65 5,022 11.39 0 0.00 29,594 57.09 297 0.59 13,749 26.91 0 0.00 297 0.59 51,103 191 3050104 100 395 0.92 1,979 3.90 0 0.00 43,739 90.94 277 0.59 1,799 3.74 0 0.00 to 0.02 49,099 192 3050110 00 13,532 9.44 22,131 15.43 0 0.00 79,699 55.57 3,796 2.65 23,150 16.14 0 0.00 1,107 0.77 143,415 193 3050110 20 11,199 11.03 9,123 9.90 0 0.00 73,195 72.00 960 0.05 4,003 4.91 0 0.00 2,293 2.25 101,544 194 3050110 30 15,094 33.63 4,132 9.74 0 0.00 22,754 40.14 940 1.79 2,125 4.50 0 0.RO 1,522 3.22 47,269 195 3050110 40 474 1.41 5,634 16.90 0 0.00 27,034 90.61 209 0.62 199 0.56 0 0.00 0 0.00 33,539 196 3050110 50 2,570 3.90 20,006 30.39 0 0.00 29,171 42.79 930 1.26 1 4,214 21.59 0 0.00 40 9.06 65,930 197 3050110 60 425 1.15 12,009 35.03 159 0.43 17,2790 4.95 287 0.79 5,163 15.66 0 0.00 0 0.00 36,900 ISO 3050110 70 0 0.00 17,970 37.00 0 0.00 19,255 39.65 1,364 2.01 9,707 19.99 267 0.55 0 0.00 49,563 199 3050111 10 4,329 2.10 49,700 24.13 0 0.00 55,977 27.09 69.9(6 33.35 26,6098 12.93 257 0.12 573 0.29 206,330 190 3050111 20 672 1.09 32,520 52.94 0 0.00 22,725 36.99 1,384 2.25 4,063 6.61 69 0.01 0 0.00 61,432 191 3050111 29 59 0.62 7,324 76.39 0 0.00 2,204 22.99 0 0.00 0 0.00 0 0.00 0 0.00 9,500 192 3050111 30 702 2.35 19,265 64.52 0 0.RO 8 ,481 29.40 633 2.12 731 2.45 49 0.17 0 0.00 29,961 193 3050111 40 969 4.44 12,534 57.43 0 0.00 6,801 31.16 1,176 5.39 316 1.45 0 0.00 30 0.14 21,925 194 3050011 50 0,196 3.21 14,224 38.23 0 0.00 04,402 39.71 5,209 14.21 1,978 5.05 0 0.00 217 0.59 37,205 195 3050112 to 970 0.76 19,949 17.41 911 0.71 46,121 40.46 99 0.09 44,382 39.94 a ll 0.71 1,039 0.91 113,979 196 3050112 20 1,552 4.46 10,665 30.63 455 1.31 10,449 30.00 69 0.20 11,219 32.22 415 1.19 0 0.00 34,923 097 3050112 30 306 0.19 14,926 9.99 0 0.00 93,290 55.49 1,265 0.75 59,240 34.64 109 0.06 0 0.00 169,136 199 3050112 40 40 0.09 6,751 14.62 0 0.00 26,461 57.29 267 0.50 12,455 26.96 217 0.47 0 0.00 46,190 (99 3050112 so 99 0.17 1,552 2.96 0 0.00 37,630 71.93 0 0.00 12,366 23.60 751 1.43 0 0.00 52,399 200 3050112 60 554 0.96 9,719 13.58 0 0.00 25,621 39.91 2,917 4.39 1,542 2.40 24,949 39.96i 0 0.00 64,200 201 3040105 so a 0.00 1,334 74.10 0 O.00 465 25.82 0 0.00 0 0.00 0 0.00 0 0.90 1,799 202 3040104 60 247 5.49 2,907 62.29 0 0.90 1,453 32.24 9 0.00 0 0.00 0 0.00 9 0.00 4,507 203 3040202 IS 69 0.39 9,619 49.50 0 0.00 9,094 51.11 0 0.00 0 0.00 0 0.00 0 0.00 17,772 204 3040202 20 1,137 11.30 4,725 46.95 0 0.00 4.122 40.96 79 0.79 0 0.00 0 0.00 0 0.RO 10,062 205 3040202 50 929 3.04 17,634 57.69 0 0.00 12,010 39.28 0 0.00 0 0.00 0 0.00 0 0.00 30,573 206 3040202 30 0 0.00 11,229 29.46 0 0.00 26,757 70.20 0 0.00 0 0.00 0 0.00 129 0.34 39,115 207 3040202 40 0 0.00 7,779 25.59 0 0.00 22,626 74.41 0 0.00 0 0.00 0 0.00 0 0.00 30,405 209 3040202 70 2,086 2.61 21,015 26.31 0 0.00 56,599 70.04 40 0.05 159 0.20 0 0.00 0 0.00 79,907 FORESTED )INFORESTED URBAN AGRICUJLTURE PASTRRELANO FOREST WATER WETLANDS WETLANDS B ARE TOTAL WATERSHED I CAT I UNIT I (ACRES) 2 (ACRES) I (ACRES) % (ACRES) (ACRES) I (ACRES) 2 (ACRES) 2 (ACRES) % (ACRES) 209 3040202 60 1,493 1.21 49,769 40.24 0 0.00 70,556 57.05 09 0.07 1,720 1.39 0 0.00 49 0.04 123,675 210 3040202 80 237 0.46 12,030 25.00 0 0.00 34,280 66.81 0 0.00 3,964 7.72 0 0.00 0 0.00 51,311 211 3040202 90 1,848 1.60 54,573 47.34 0 0.00 49,691 42.24 138 0.12 9,835 8.53 0 0.00 lAO 0.16 115,273 212 3040202 97 336 3.22 6,455 61.84 0 0.00 3,647 34.94 0 0.00 0 0.00 0 0.00 0 0.00 10,439 213 3040202 too 2,619 2.35 74,312 66.77 0 0.00 23,654 21.25 40 0.04 10,675 9.59 0 0.00 0 0.00 111,300 214 3040202 110 514 1.29 22,715 56.97 A 0.00 13,028 32.67 0 0.00 3,499 8.701 0 0.00 119 0.30 39,974 215 3040202 140 969 6.07 8,926 35.95 8 0.00 5,377 33.71 0 0.00 623 3.90 0 0.00 59 0.37 15,954 216 3040202 150 1,947 5.42 17,308 48.16 0 0.00 12,311 34.43 20 0.06 4,171 11.6) 0 0.00 119 0.33 35,940 217 3040202 120 1,572 1.51 37,275 35.79 0 0.00 52,220 50.15 247 0.24 12,662 12.16 0 0.00 1581 0.15 104,134 216 3040202 160 761 2.20 15,252 44.16 0 0.00 13,987 40.50 10 0.03 4,480 12.99 0 0.00 40 0.11 34,537 219 3040202 170 563 1.72 15,570 47.50 0 0.00 12,850 39.18 49 0.15 3,756 11.45 0 0.00 0 0.00 32,797 220 3040202 130 001 1.97 15,973 39.32 0, 0.00 20,056 49.37 49 0.12 3,746 9.22 0 0.00 0 0.00 40,625 221 3040205 30 1,275 1.77 39,192 54.43 0 0.00 25,720 35.72 59 0.08 5,763 8.00 0 O.00 0 0.00 72,009 222 3040205 40 0 0.00 0 ,530 64.55 0 0.80 2,560 19.37 69 0.52 2,056 15.56 0 0.00 0 0.00 13,216 223 3040205 to 1,226 2.04 46,141 76.09 0 0.00 5,140 8.57 0 0.00 7,502 12.30 0 0.00 0 0.00 60,009 224 3040205 20 10 0.10 5,733 59.92 0 0.80 3,697 30.64 0 0.00 12B 1.34 0 0.00 0 0.00 9,560 225 3040205 60 2,323 3.89 39, 509 66.09 0 0.00 8,995 15.05 I SO 0.20 9,669 14.50 0 0.00 119 0.20 59,182 226 3040205 so 544 1.08 16,853 58.35 0 0.00 3,550 12.32 0 0.00 7,888 27.31 0 0.00 40 0.14 28,883 227 3040205 so 14,254 14.24 37,947 37.92 0 0.00 40,2009 40.26 1,404 1.40 5,516 5.51 40 0.04 613 0.61 100,061 228 3040205 90 3,707 2.12 84,365 48.10 0 0.00 61,432 35.00 415 0.24 24,395 13.93 0 0.00 791 0.45 175,105 229 3040205 7 0 1,166 1.40 32,421 38.89 237 0.28 30,761 36.89 109 0.13 17,525 21.02 554 0.66 603, 0.72 83,376 O' 230 3040205 Ito 1,552 1.20 53,238 43.97 0 0.00 50,679 41.06 59 0.05 12,830 10.60 0 0.00 2,718 2.25 121,076 231 3040205 too 0 0.00 5,773 23.29 0 0.00 11.822 47.71 69 0.28 5,604 22.94 0 0.00 1,433 5.78 24,701 232 3040205 120 4814 1.20 15,123 37.35 0 0.00 16,398 40.50 10 0.02 8 ,441 20.85 0 0.00 30 0.07 40,487 233 3040205 130 3,025 6.03 22,487 44.83 0 0.00 21,202 42.27 49 0.10 3,242 6.46 0 0.00 158 0.32 50,164 234 3040205 140 1,878 1.26 59,129 39.70 69 0.05 65,772 44.16 109 0.07 21,865 14.68 0 0.00 109 0.01 148,930 235 3040205 1 60 593 0.70 33,004 39.11 0 0.00 38,154 45.11 30 0.04 12,721 15.04 0 0.00 0 0.00 84,582 236 3040205 150 2 ,224 1.90 25,472 21.74 0 0.00 66,207 56.50 89 0.00 22,991 19.62 188 0.16 0 0.00 117,171 237 3040205 170 217 0.26 17,891 21.27 0 0.00 54,760 65.10 149 0.18 11,061 13.15 20 0.02 20 0.02 84,117 238 3040205 180 I ,19 1.35 1,071 7.97 0 0.00 56,876 64.07 2,550 2.07 13,710 15.44 7,324 8.25 40 0.04 90,773 239 3040207 40 5,259 4.08 8,056 7.47 0 0.00 71,673 66.50 949 0.89 15,707 14.57 5,812 5.39 326 0.30 107,781 240 3040207 50 170 0.36 1,947 3.97 0 0.00 25,057 51.15 1,364 2.78 4,410 9.02 16,023 32.71 0 0.00 48,988 241 3040207 30 9,924 29.74 2,283 6.94 0 0.00 14,530 43.54 1,326 3.67 969 2.90 3,321 9.95 1,117 3.35 33,370 242 3040201 62 2,422 1.31 74,144 39.98 0 0.00 105,349 56.81 563 0.30 2,530 1.36 0 0.00 445 0.24 105,454 243 3040201 too 870 0.76 38,886 33.92 0 0.00 72,246 63.02 2,105 1.04 0 0.00 0 0.00 524 0.46 114,631 244 3040201 go 504 1.02 14,441 29.24 0 0.00 34,121 69.10 119 0.24 198 0.40 0 0.00 0 0.00 49,383 245 3040201 33 0 0.00 9,114 55.31 0 0.00 7,245 43.97 30 0.18 0 0.00 0 0.00 89 0.54 16,470 246 3040201 29 0 0.08 1 809 31.73 0 0.00 2,521 52.50 465 9.69 0 0.00 0 0.00 0 0.00 4,794 247 3040201 19 0 0.00 F1076 33.35 0 0.00 3,766 64.14 30 0.5) 0 8.00 0 0.00 0 0.00 5,871 248 3040201 41 a 0.00 2,372 13.11 0 0.00 15,618 86.34 99 0.55 0 0.00 0 0.00 0 0.00 19,089 249 3040201 50 3,085 1.64 63,973 27.04 0 0.00 134,400 56.80 4,754 2.01 28,033 11.85 0 0.00 1,572 0.66 236,616 250 3040201 72 2,689 6.03 25,196 56.47 0 0.00 12,978 29.09 662 1.49 1,839 4.12 49 8.11 1,206 2.70 44,619 251 3040201 97 130 2.04 4,003 59.12 0 0.00 2,629 30.83 0 0.00 a 0.00 0 0.00 0 0.00 6,771 252 3040201 70 701 1.07 41,545 56.71 0 0.00 29,515 40.29 171 0.24 860 1.17 0 0.00 385 0.53 73.264 253 3040201 1)0 16,250 7.83 105,794 51.00 0 0.00 90,600 30.86 503 0.20 3,331 1.61 89 0.04 781 0.30 207,437 254 3040201 130 10,181 6.97 61,986 42.46 0 0.00 70,378 40.21 544 0.37 2,165 1.49 200 0.14 514 0.35 145,975 255 3040201 120 514 0.56 16,547 17.95 0 0.00 42,484 46.09 1.572 1.70 30,514 33.10 474 0.51 79 0.09 92,183 256 3040201 ISO 3,1983 2.94 46,378 42.91 0 0.00 45,459 42.06 217 0.20 12,820 11.06 0 0.00 200.02 100,078 2S7 3040201 140 227 0.35 11,802 19.18 0 0.00 33,746 51.98 1,670 2.51 17,476 26.92 0 0.00 0 0.00 64,922 250 3040201 160 3,311 3.21 23,911 23.21 0 0.00 42,296 41.05 49 0.05 33,469 32.40 0 0.00 0 0.00 103,036 259 3040201 Ile 899 1.10 5,031 6.18 0 0.00 37,196 45.67 4,221 5.18 21.726 26.67 12,267 15.06 109 0.13 81,449 260 3040204 IS 603 2.28 16,576 62.76 0 0.00 0,441 31.96 158 0.60 633 2.40 0 0.00 0 0.00 26,411 FORESTED (JNFORESTED URBAN AGRICULTURE PASTURELAND FOREST WATER WETLANDS WETLANDS B ARE TOTAL. WATERSHED N CAT 0 UNIT I (ACRESI I (ACRES) I (ACRES) I (ACRES? z (ACRES? 2 (ACRES) I (ACRES? % (ACRES? I IACRES) 261 3040204 SR 2,749 2.56 53,742 50.16 0 0.00 39,510 35.94 169 0.16 11,970 11.17 0 0.00 0 0.00 107,139 262 3 040204 39 277 5.20 3,4A9 66.23 0 0.00 92n 17.74 0 0.00 563 10.75 0 0.00 0 0.00 5,239 263 3040204 30 3,143 3.49 40,655 45.11 0 0.00 23,169 25.72 159 0.18 22,420 24.90 0 0.00 554 0.61 90,099 264 3040204 49 0 0.00 1,049 54.09 0 0.00 474 24.49 0 0.00 415 21.43 0 0.00 0 0.00 1,937 265 3040204 60 257 1.97 6,217 47.09 0 0.00 1,493 11.44 79 0.61 4,932 37.90 40 0.30 0 0.00 13,049 266 3040204 70 4,754 2.28 51,569 24.74 0 0.00 85,659 41.09 1,611 0.77 63,943 30.67 791 0.37 130 0.07 209,455 267 3040204 90 395 0.79 20,007 41.40 0 0.00 20,421 40.63 40 0.09 9,590 17.07 0 0.00 20 0.04 50,263 269 3040204 go 1,049 0.99 44,510 42.20 A 0.00 42,266 40.07 l ee 0.19 17,229 16.33 0 0.00 237 0.22 105,478 269 3040204 as 0 0.00 10,527 36.22 0 O.00 9,529 32.79 20 0.07 8 ,905 30.92 0 0.00 0 0.00 29,061 270 3040203 215 336 0.91 17,950 49.69 0 0.00 13,631 36.97 128 0.35 4,824 13.09 A 0.00 0 0.00 36,969 271 3040203 220 356 0.67 15,618 29.54 0 O."0 16.566 31.33 40 0.07 19,947 37.73 209 0.39 138 0.26 52,972 272 3040206 66 257 2.55 4,557 45.28 0 0.00, 4,092 40.57 0 0.00 1,166 11.59 0 0.00 0 0.00 10,062 273 3040206 100 40 0.16 7,018 28.49 0 0.00 11,901 48.31 0 0.00 5,674 23.03 0 0.00 0 0.00 24,632 274 3040206 110 79 0.24 13,978 42.40 0 0.00 14,283 43.64 0 0.00 4,488 13.71 A 0.00 0 0.00 32,720 275 3040206 120 4,774 5.63 32,332 39.13 0 0.00 35,130 41.43 227 0.27 12,119 14.29 0 0.00 217 0.26 84,799 276 3040206 91 969 2.60 9,501 22.82 0 0.00 19,039 40.43 10 0.03 9,637 25.99 0 A.0U 8 9 0.24 37,245 277 3040206 130 1,394 1.97 6,049 9.56 0 0.00 ,24,306 34.39 119 0.17 37,976 53.73 0 D."0 930 1.17 70,674 270 3040206 140 91,699 8.37 10,972 10.56 0 0.00 49,462 47.62 I ce 0.95 32,184 30.99 237 0.23 1,325 1.28 103,967 279 3040206 ISO 3,796 9.49 950 2.13 0 0.00 22,151 55.48 1,0473 3.69 3,697 9.26 7,265 19.20 702 1.76 39,924 280 3040206 29 0 0.00 III 25.53 0 0.00 0 0.00 0 0.00 346 74.47 0 0.00 0 0.00 465 4- ~~~~~~ TOTAL 997,892 4.39 5,761,955 28.17 16,240 0.08 10,569,617 51.67 500,602 2.45 2,075,130 10.14 521,559 2.55 113,237 0.55 20,456,221 LITERATURE CITED 1. Baker, V. A. 1977. "Stream Channel Response to Floods with Experiments from Texas". Geo. Soc. Amer. V 88 1-057-1071. 2. Barfield, B. J., R. C. Warner and C. T. Haan. 1981. Applied Hvdroloav and Sedimentoloav for Disturbed Areas. Oklahoma Technical Press, Stillwater, Oklahoma. 3. Beasley, D. B., L. F. Huggins, and E. F. Monke. 1980. ANSWERS: "A Model for Watershed Planning". Trans. ASAE, Vol. 10(3):485-492. 4. Betson, R. P., J. Bales, and H. E. Pratt. 1980. User's Guide to TVA-HYSIM, A Hydrologic Program for Quantifying Land-use Change Effects. Tennessee Valley Authority, Knoxville, Tennessee. 5. Dissmeyer, G. E. and G. R. Foster. 1980. A Guide for Predictina Sheet and Rill Erosion on Forest Land. USDA Forest Service Southeastern Area SATP 11. 6. Foster, G. R., R. A. Young and W. H. Neibling. 1985. "Sediment Comrposition for Nonpoint Source Pollution Analyses". Trans. Amer. Soc. Agric. Engrs. 28(1) :133-139. 7. Overton, D. E. and E. C. Crosby. 1979. "Effects of Contour Coal Strip Mining on Stormwater Runoff and Quality". Report to U.S. Department of Energy, Department of Civil Engineering, University of Tennessee, Knoxville, Tennessee. 8. Rhoton, F. E., L. D. Meyer and F. D. Whisler. 1982. "A Laboratory Method for Predicting the Size Distribution of Sediment Eroded from Surface Soils". Soil Sci. Soc. Am. Jour., 46:1259-1263. 9. Soil Conservation Service. 1980. Resource Inventorv South Carolina 1977. USDA, Soil Conservation Service, Columbia, South Carolina. 10. Soil Conservation Service. 1988. Draft General Soil Map of South Carolina. USDA, Soil Conservation Service, Columbia, South Carolina. 11. Williams, J. R. 1976. "Sediment Prediction with Universal Equation Using Runoff Energy Factor". In Present and Prospective Technology for Predicting Sediment Yields and Sources. Publication ARS-S-40, Agriculture Research Service, U.S. Dept. of Agriculture, Washington, DC. 12. Wischmeier, W. H., and D. D. Smith. 1965. "Rainfall Erosion Losses from Cropland East of the Rocky Mountains". Aaricultural Handbook No. 282, U.S. Department of Agriculture, Washington, DC. 65 LITERATURE CITED (Con't.) 13. Wischmeier, W. H., C.B. Johnson and B. V. Cross. 1971. " A Soil Erodibility Ncmograph for Farmland and Construction Sites". Jour. Soil Water Conserv., 36(5):189-193. 14. Wolman, M. G. and J. T. Miller. 1960. "Magnitude and Frequency of Forces in Geomorphic Processes". J. Geol. V 68, P.54-74. 66