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.... TARRANT COUNTY WATER CONTROL AND IMPROVEMENT DISTRICT NUMBER ONE TEXAS WATER DEVELOPMENT BOARD Upper West Fork and Clear Fork Trinity River Basin Water Quality and Regional Facility Planning Study - FINAL REPORT August 1988 Alan Plummer and Associates, Inc. ~ CIVIL/ENVIRONMENTAL ENGINEERS 'ARIJNGTON-FORT WORTH, TEXAS i~ TARRANT COUNTY WATER CONTROL AND IMPROVEMENT DISTRICT NUMBER ONE TEXAS WATER DEVELOPMENT BOARD Upper West Fork and Clear Fork Trinity River Basin Water Quality and Regional Facility Planning Study FIN AL REPORT August 1988 Alan Plummer and Associates, Inc. r: ...... CIVIL/ENVIRONlaNTAL ENGINEERS· ARLINGTON- FORT WORTH. TEXAS ~ ~ bi Alan Plummer and Associates, Inc. ENVIRONMENTAL/CIVIL ENGINEERS 307-0520/2 August 31, 1988 Mr. James M. Oliver Tarrant County Water Control and Improvement District No.1 800 East Northside Drive Fort Worth, Texas 76106 Re: Upper West Fork and Clear Fork Trinity River Basin Water Qual ity Regional Facility Planning Study - Final Report Dear Mr. Oliver: Transmi tted herewith is the Fi na 1 Report for the Upper West Fork and Cl ear Fork Trinity River Basin Water Quality and Regional Facility Planning Study. This report includes the following bound documents. Upper West Fork and Clear Fork Trinity River Basin Water Quality and Regional Facility Planning Study - Final Report Appendix A Clear Fork - Weatherford Facility Planning Region - Appendix B Eagle Mountain Lake Facility Planning Region - Appendix C Individual Communities Outside of Designated Facility Planning Regions - Appendix D Methodologies Appendix E Water Quality Data The final report incorporates comments transmitted by the Texas Water Development Board by letter of August 8, 1988, and editorial changes by our staff. 210 West 6th Street. Suite 605 • Fort Worth, Texas 76102 • (817) 3324085 • Metro 429·9567 Mr. James M Oliver Page 2 August 31, 1988 We feel that this study will provide a valuable water quality management tool to Tarrant County Water Control and Improvement District No.1, the Texas Water Development Board, the Texas Water Commission, and the various communities in the upper Trinity River Basin and have appreciated your support in performing the study. Sincerely, ALAN PLUMMER AND ASSOCIATES, INC. Richard H. Smith, P.E. RHS/mm Enclosure TABLE OF CONTENTS Chapter Description Page No. I EXECUTIVE SUMMARY I-I General I-I Procedures I-I Results 1-2 Existing Water Quality 1-2 Po 11 utant Loads 1-3 Wastewater Treatment Plant Effluent Requirements 1-3 RECOMMENDATIONS AND CONCLUSIONS 1-3 Clear Fork-Weatherford Region 1-3 Eagle Mountain Lake Region 1-9 Individual Communities Outside of Designated Facility Planning Regions 1-10 Recommended Ongoing Water Quality Management I-II I I INTRODUCTION 11-1 Study Objectives 11-1 General Methodology 11-1 Study Area 11-2 Study Area Characteristics 11-5 Land Use and Population Estimates 11-9 Land Use Within the Study Area 11-10 Population Estimates and Projections II -12 Existing and Projected Water Use 11-16 Surface Water II -16 Groundwater II -21 Water Quality Standards II-21 Classification of Surface Waters II -23 General Water Quality Criteria 11-25 Antidegradation 11-29 Toxic Materials 11-29 Site-Specific Uses and Numerical Criteria 11-32 Summary II -36 III WATER QUALITY ASSESSMENT I II-I Introduction I I I -1 Historical Water Quality I II-I Water Quality Monitoring Stations I II-I Numerical Criteria for Nontoxic Materials II 1-2 Conclusions II I -33 Nutrients II I -34 Toxic Substances 111-35 Additional Water Quality Studies 111-40 Summary 111-42 TABLE OF CONTENTS (continued) Chapter Description Page No. III WATER QUALITY ASSESSMENT (continued) Existing and Projected Pollutant Loads II 1-43 Point Source Dischargers II I -43 Nonpoint Source Pollutant Loads II 1-43 Comparison of Point Source Discharger Loads and Nonpoint Source Loads III-52 Water Quality Projections 111-69 Procedures II I -70 Results III-74 Stream Analysis II I -79 Summary I II -80 IV WASTEWATER FACILITY PLANS IV-I Introduction IV-I Methodology IV-2 Potential Management and Funding Alternatives IV-4 Clear Fork-Weatherford Facility Planning Region IV-6 Area Included in Facility Planning Region IV-6 Population Projections IV-8 Summary of Alternatives IV-8 EXisting Organized Systems IV-IO EXisting On-Site Systems IV-I2 Eagle Mountain Lake Facility Planning Region IV-I3 Area Included in Facility Planning Region IV-13 Population Projections IV-17 Summary of Alternatives - Phase I IV-2I Summary of Alternatives - Phase II IV-24 Existing Organized Systems IV-25 Existing On-Site Systems IV-25 Individual Communities Outside of Designated Facility Planning Regions IV-27 Areas Included as Individual Communities IV-27 Population Projections IV-29 Summary of Alternatives IV-29 Existing Organized Systems IV-32 V LOCAL INVOLVEMENT V-I General V-I Advisory Committees V-I Meetings with Councils of Government V-5 Meetings with Local Officials V-5 Meetings with Special Interest Groups V-6 i i TABLE OF CONTENTS (continued) Chapter Description Page No. VI ONGOING AND FUTURE WATER QUALITY MANAGEMENT ACTIVITIES VI-l General VI-l Lake Water Quality Monitoring VI -2 Routine Monitoring VI -4 Intensive Lake Surveys VI -5 Basic Intensive Lake Sampling Program Contents VI -6 Lake Data Analysis VI -7 Stream Water Quality Monitoring VI -8 Assessment of Permit Applications VI -8 Assessment of Nonpoint Pollution VI -8 Regulation of Private Sewage Facilitie VI -9 Coordination with Other Agencies VI -10 Water Quality Data Management VI-I0 Updates of This Study VI -11 iii LIST OF TABLES Table No. Description Page No. I-I Summary of Results 1-7 II -1 Political Subdivisions within Project Planning Area 11-1 II -2 Upper Trinity River Basin Watersheds Land Use Summary 1985 Conditions 11-10 11-3 Upper Trinity River Basin Watersheds Land Use Summary 2005 Conditions I 1-11 11-4 Estimated and Projected Watershed Populations 11-12 11-5 Upper Trinity River Basin Water Quality Management Plan Facility Planning Areas Population Estimates and Projections 11-14 11-6 Sewered and Unsewered 1987 Watershed Populations II -15 11-7 Upper Trinity River Basin Lakes Wholesale Surface Water Suppliers II -16 11-8 Upper Trinity River Basin Lakes Estimating and Projected Consumptive Water Use I 1-17 11-9 Groundwater Sources for Major Water Production Facilities 11-22 II -10 Drinking Water Standards 11-30 II-11 Criteria for Septic Toxic Materials 11-31 11-12 Current Texas Surface Water Quality Standards Upper Trinity River Basin II-34 II-13 1985 Texas Surface Water Quality Standards Upper Trinity River Basin 11-35 II -14 1981 Texas Surface Water Quality Standards Upper Trinity River Basin 11-36 II -15 Dissolved Oxygen Criteria Aquatic Life Subcategories II -37 I II-I Water Quality Sampling and Monitoring Stations In the Upper Trinity River Basin II 1-3 II 1-2 Summary of Standard Water Quality Parameters by Segment Upper Trinity River Basin 111-28 II 1-3 Summary of Nutrient Levels by Segment Upper Trinity River Basin I II -34 I 11-4 Upper Trinity River Basins Water Quality Management Plan Point Source Dischargers II I -44 I II-5 Summary of Rainfall and Runoff Coefficients Used in Estimating Nonpoint Sources for Existing Conditions II I-53 I II-6 Summary of Rainfall and Runoff Coefficients Used in Estimating Nonpoint Sources for 2005 Projected Conditions II I - 54 iv LIST OF TABLES (continued) Table No. Description Page No. I II-7 Summary of Nonpoint Source Loads Total Annual EXisting Nonpoint Source Loads (lb/year) III-55 I II-8 Summary of Nonpoint Source Loads Total Annual 2005 Nonpoint Source Loads (lb/year) II I-56 II 1-9 Potential Annual Pollutant Loads to Study Area Lakes from Septic Systems III-57 111-10 Nonpoint Source and Point Source BOD Load Comparisons 1986 Conditions II I-58 111-11 Nonpoint Source and Point Source Nitrogen Load Comparisons 1986 Conditions I II -60 1II-12 Nonpoint Source and Point Source Phosphorous Load Comparisons 1986 Conditions 111-61 II I -13 Nonpoint Source and Point Source Load Comparisons - Projected Conditions I II -62 1II-14 Summary Table of Nonpoint Source and Point Source Load Comparison II I -64 III-15 Nonpoint Source and Point Source BOD Load Comparisons 1986 Conditions II I -65 111-16 Nonpoint Source and Point Source NItrogen and Phosphorous Load Comparisons 1986 Conditions 111-66 111-17 Nonpoint Source and Point Source Load Comparisons - Projected Conditions 111-67 I II -18 Summary Table of Nonpoint Source and Point Source Load Comparison 111-68 111-19 Comparison of Observed and Calculated Values for Lake Worth 111-71 111-20 Comparison of Observed and Calculated Values for Lake Benbrook 111-72 111-21 Comparison of Observed and Calculated Values for Eagle Mountain lake 111-73 111-22 Projected Chlorophyll "a" for Eagle Mountain Lake 111-75 111-23 Projected Chlorophyll "a" for Lake Benbrook 111-77 111-24 Simplified Modeling Results Projected Effluent Sets 2005 Projected Flows Under Normal and Limited Aeration 111-81 111-25 Summary or Results I II -82 IV-l EXisting Management Agencies Considered IV-5 IV-2 Clear Fork-Weatherford Facility Planning Region Facility Planning Area Population Estimates and Projections IV-9 v LIST OF TABLES (continued) Table No. Description Page No. IV-3 Clear Fork-Weatherford Facility Planning Region Summary of Estimated Costs for Organized System IV-II IV-4 Clear Fork-Weatherford Facility Planning Region Summary of Soil Suitability for On-site Disposal IV-I4 IV-5 Eagle Mountain Lake Facility Planning Region Facility Planning Area Population Estimates Estimates and Project ions IV -18 IV-6 Eagle Mountain

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