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Water Resources Management Plan, Santa WATER RESOURCES MANAGEMENT PLAN Monica Mountains National Recreation Area Lsaflta Prepared for the National Park Service by Louis Levy Ph.D and John Korkosz M.S Environmental Careers Organization April 1997 23 .4 .. 27 .0 101 .. 101 134 23 1011 40c Pacific Plot produced at National Park Service PLEASE RETURN TO Santa Monica Mountains fl National Recreation Area GIS PLEASE REThP irj TECHNICAL INFORMATION CENTER USGS 7.5 Digital Elevation Models YER Thomas Bros IVL NATlO ON MICROFILM United States Department of the Interior NATIONAL PARK SERVICE 2- Santa Monica Mountains National Recreation Area 30401 Agoura Road Suite 100 IN REPLY REFER TO Agoura Hills California 91301 N3617SAMO May 16 1997 Dear Friends of the Santa Monica Mountains NRA Water Resources Plan Please find enclosed copy of the recently approved Management April 1997 Revision for the Santa Monica Mountains National Recreation Area This update represents broad redirection of the park water resources management program in this toward interagency cooperation and watershed and ecosystem management unique unit of the National Park System and Resources If you have any questions about the plan please contact Chief of Science Management Jim Benedict at 818 597-1036 extension 233 Sincerely Arthur Eck Superintendent Enclosure PLEASE RETURN TO TECHNICAL INFORMATION CENTER DENVER SERVICE CENTER NATIONAL PARK SERVICE Water Resources Management Plan Santa Monica Mountains National Recreation Area April 1997 Revision Submitted By NJUt b1tQ _____ Chief of Science and Resources Management Santa Date Monica Mountains National Recreation Area Recommended By Deputy Superintendent Santa Monica Mountains Date National Recreation Area Approved By // Supjn an nica Mountains Nal Date Recreation Area TABLE OF CONTENTS PREFACE Vii INTRODUCTION I-i l.A Purpose of the Plan 1-2 I.B Legislative and Regulatory Relationships 1-6 Federal Legislation and Authorities 1-6 National Park Service Organic Act 1916 National Historic Preservation Act 1966 National Environmental Policy Act 1969 Water Quality Improvement Act 1970 Coastal Zone Act 1972 The Resource Conservation and Recovery Act 1976 Endangered Species Act 1973 Safe Drinking Water Act 1974 Amendments 1986 Mining in Parks Act 1976 Protection of Wetlands Executive Order 11990 1977 Floodplain Management Executive Order 11988 1977 Federal Water Pollution Control Act Clean Water Act Executive Order 11987 Exotic Species Enabling Legislation Santa Monica Mountains National Recreation Area P.L 95-625 1978 Executive Order 12088 Environmental Pollution 1978 State Legislation and Authorities 1-10 Municipal Water District Act 1935 County Water Authority Act 1944 Porte-Cologne Water Quality Control Act 1970 California Environmental Quality Act 1970 California Coastal Act 1976 Stream Alteration Permit California Fish and Game Code Section 1603 Navigation Dredging Permit California Fish and Game Code Section 5653 The Safe Drinking Water and Toxic Enforcement Act Proposition 65 1986 Local Statutes I-li Los Angeles CountyFlood Control Act 1915 and 1931 Ventura County Flood Control Act 1944 LC.WaterRights .1-12 LD Land Status Uses and Planning Relalionships 1-14 Land Status Uses Planning Relationships I.E Identification of Water Resources Issues 1-16 IL THE HYDROLOGIC ENVIRONMENT 11.A Introduction 11-1 11 Desaiption of the Area 11-1 Climate 11-2 Geology and Paleontology 11-6 Soils 11-9 Water Resources 11-13 Vegetation 11-26 Watershed Management Practices 11-31 11 Surface Water Resources 11-36 1.WaterQUafltlty 11-36 2.WaterQuality 11-41 Estuaiies and Lagoons 11-48 Fires 11-49 Beaches 11-53 11 Groundwater 11-55 11 Water Uses 11-56 ILL WATER RESOURCES MANAGEMENT PROGRAM ffl.A Mission Statements and Mandates ffl-1 ffl.B Resource Management Goals ffl-2 II ffl.C Management ffl-3 ifiD Identification Objof Water Resource Issues ffl-6 ffl.E Summary of Resource Management Project Statements .111-11 ffl.F ffl-13 ffl.G Project Priorities ffl-13 ffl.R Project Statements ffl-17-129 SAMO-I-102.050 Calabasas Landfill EA/Special Use Permit 17 SAMO-N-300.012 Participation in Wetland Mitigation Bank Program 20 SAMO-N-30 1.010 Conduct Inventory and Assessment Water Resources 23 SAMO-N-30 1.030 Inventory Water Rights 27 SAMO-N-30 1.040 Identify and Manage Floodplains 31 SAMO-N-301.070 Create NPS Information Management Repository for All Water Resources Within and Surrounding the Santa Monica Mountains National Recreation Area 34 SAMO-N-304.010 Conduct Zuma Lagoon Restoration Project 38 SAMO-N-304.020 Cooperate with the U.S Navy and Other Agencies to Restore Mugu Lagoon and Associated Uplands 45 SAMO-N-304.030 Rocky Oaks Dam Stabilization 50 SAMO-N-304.040 Develop and Implement Hazardous Waste Management Plan 53 SAMO-N-304.050 Satwiwa Pond Dredging Project 57 Oil 61 SAMO-N-304.060 Response to Spills SAMO-N-304.070 Restoration of Water Resources for Equine Program at Rancho Sierra Vista 64 SAMO-N-3 05.0 10 Long-Term Monitoring and Evaluation of Sediment Yield in Areas Reseeded After Wildfire 67 SAMO-N-306.010 Monitor Water Pollution From Visitor Use 71 SAMO-N-307.010 Terrestrial Impacts on the Off-Shore Area of Special Biological Significance 74 SAMO-N-308.010 Evaluate Non-Point Source Pollution From Livestock 77 SAMO-N-3 11.010 Inventory Identif and Evaluate Alien Fish Species in the Santa Monica Mountains 81 SAMO-N-312.010 Develop an Interagency Fish SteelheadlPaciflc Lamprey/Arroyo Chub Management Plan for the Santa Monica Mountains 85 SAMO-N-313.010 Identify Impacts from Existing and Planned Golf Courses on Trancas Creek and Malibu Creek 89 SAMO-N-315.010 Use Docents to Lead Bus Tours of Mugu Lagoon 93 SAMO-N-3 16.010 Establish Visitor Facilities at Mugu Lagoon 96 111 SAMO-N-3 17.010 Prepare Water Resources Brochure 100 SAMO-N-3 18.0 10 Handicap Access to Water Resources 104 SAMO-N-320.010 Evaluate Water Quality at Rocky Oaks Pond Satwiwa Pond and Franklin Canyon Lake and Other Areas of Standing Water 107 SAMO-N-400.040 Inventory Extent of Wetlands 110 SAMO-N-402.015 Monitor Health and Status Changes over Time of Native Plant Communities Develop Riparian Community Monitoring Handbook 114 SAMO-N-403 .015 Potrero Creek Restoration Project 118 SAMO-N-504.014 Develop Inventory and Monitoring Guidelines for Terrestrial and Aquatic Vertebrates Monitor Reptile and Amphibian Population Status and Trends 122 SAMO-N-504.080 Conduct Inventory and Assessment Terrestrial and Aquatic Insects 125 1V APPENDICES Appendix List of Preparers and Acknowledgments Appendix Consultation and Coordination Appendix Basin Morphometry Appendix Carbon Canyon Station Rainfall 1983-1994 Appendix Malibu Beach-Dunne Station Rainfall 1983-1994 Appendix Santa Ynez Station Rainfall 1963-1994 Appendix Topanga Ranger Station Rainfall 1983-1994 Groundwater Appendix Levels in Trancas and Zuma Canyons Appendix Beneficial Uses of Surface Waters 1993 Annual Appendix Water Quality Monitoring Report for Malibu Watershed by Tapia Treatment Plant Appendix Effects of First Rain on Malibu Creek Coliform and Enterococci Levels Appendix Population Impacts on Stream Systems iv Appendix Threatened and Endangered Species Appendix Agencies with Jurisdiction in the Santa Monica Mountains Appendix Bibliography LIST OF TABLES Table Total Annua Rainfall by Station for 1983-1994 11-4 Table Maximum and Minimum Rainfall by Station for 1983-1994 11-5 Table Stream Segments in Santa Monica Mountains Zone 11-16 Table Santa Monica Mountains Zone Stream Order and Ratios 11-16 Table Malibu Creek Watershed Monitoring Agencies and General Locations of their Sampling Locations 11-34 Table Tests Perfonned 11-35 Table Illustrative Changes in Water Volume of the Two Major Watersheds intheSMMNRA 11-40 Table Water Quality Objectives for Inland Surface Waters with Identified Beneficial Uses 11-43 Table Ranges of Selected Parameter Concentrations Found in Malibu Creek Watershed 11-45 Table 10 Comparison of Constituents in Mugu Lagoon Watershed Tributaries Water Column to Recommended Objectives 11-47 Table 11 Relation of Issues from Scopmg Session with Objectives and Project Statements ffl-9 Table 12 Titles of Proposed Projects According to Management Objectives rn-i Table 13 Projects Listed by Priority ffl-14 VL LIST OF FIGURES Figure SMMNRA Zone 1-3 Figure SMMNRA Land Use Plan .1-4 Figure SMMNRA Current Land Ownership 1-5 Figure Rainfall Isoheyts Santa Monica Mountains and Vicinity 11-7 Figure General Stratigraphy for Santa Monica Mountains 11-10 Figure Watersheds in SMMNRA 11-15 Figure Stream Segments vs Stream Order 11-17 Figure Floodplain Insurance Maps 11-27 Figure Major Surface Waters of the Malibu Creek Watershed 11-33 Figure 10 Comparison ofBackground Flow in Malibu Creek 1950s and 1980S 11-38 Figure 11 Groundwater Levels in Zuma Canyon 11-39 Figure 12 Surface Waters of Calleguas-Conejo Creek Watershed 11-46 Figure 13 Fire History in SMMNRA 11-52 Figure 14 Fire Progression of 1993 Old Topanga Fire 11-54 vi PREFACE This update of the Water Resources Management Plan WRMP for the Santa Monica Mountains National Recreation Area SMMNRA is being prepared for use by professional park staff public and private organizations and concerned citizens who have an interest in the health of the entire ecosystem of the SMMNRA Many changes have occurred in the SMMNRA since the preparation of the last WRMP in 1984 There have been real estate fluctuations of recession and recovery which have altered the acquisition of park property Development of adjacent lands and lands targeted for acquisition has also been altered with effects on the park Fires and flooding of
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