Draft North Sonoma County Agricultural Reuse Project Environmental Impact Report/ Environmental Impact Statement
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DRAFT NORTH SONOMA COUNTY AGRICULTURAL REUSE PROJECT ENVIRONMENTAL IMPACT REPORT/ ENVIRONMENTAL IMPACT STATEMENT March 2007 Prepared for: Sonoma County Water Agency 440 Aviation Boulevard Santa Rosa, CA 95409 and US Department of the Interior Bureau of Reclamation 2800 Cottage Way Sacramento, CA 95825 State Clearinghouse No. 2006012130 DRAFT Environmental Impact Report/Environmental Impact Statement North Sonoma County Agricultural Reuse Project being jointly pursued by the U.S. Department of Interior, Bureau of Reclamation, and the Sonoma County Water Agency The U.S Department of Interior, Bureau of Reclamation (Reclamation) and the Sonoma County Water Agency (SCWA) have prepared this joint Environmental Impact Report/Environmental Impact Statement (EIR/EIS) on the proposed North Sonoma County Agricultural Reuse Project (NSCARP) to construct and operate a recycled water project. The SCWA is a special district created by California legislation in 1949 that supplies water to cities and public agencies throughout most of the populated areas of Sonoma County and northern Marin County and is the state lead agency, and Reclamation is the federal lead agency for this EIR/EIS, pursuant to the California Environmental Quality Act (CEQA) and the National Environmental Policy Act (NEPA), respectively. NSCARP objectives are to provide a reliable, long-term water supply for agricultural interests; reduce discharges from local wastewater treatment plants to local waterways; reduce the use of groundwater and surface water for agricultural purposes in north Sonoma County; provide an environmentally responsible, long-term method of recycled water use; and, increase reliability and long-term sustainability of the regional water supply. NSCARP would result in fewer agricultural diversions from the Russian River and its tributaries, which would enable the SCWA to release less water from storage in Lake Mendocino and Sonoma to meet water demands and instream flow requirements. This would result in more water being conserved in storage in these reservoirs, which would provide more operational flexibility for the SCWA to benefit fisheries sources in the Russian River. The increased operational flexibility would not result in additional water being available for other uses because existing reservoir storage capacity, water rights, and flow requirements would not change. In addition to the No Action alternative, three primary alternatives are under consideration. Alternative 2 represents a recycled water supply project for the entire NSCARP area. It would involve the design and construction of 19 recycled water storage reservoirs totaling about 11,200 acre-feet (af) in storage capacity. In addition, Alternative 2 would involve the design and construction of approximately 112 miles of transmission pipeline, and numerous booster and distribution pump stations for conveying water from the Geysers Pipeline to the storage reservoirs, and for distribution of the storage recycled water from the reservoirs to the agricultural lands. Alternative 3 represents a scaled-down version of the Alexander Valley subarea by limiting storage reservoir development to only the Jordan A and Jordan C reservoirs. Alternative 4 represents a scaled-down version of the Russian River Valley subarea. It limits storage reservoir development to the Russel-Bucher, Bucher, and Becnel #2 reservoir sites and utilizes the existing Gallo Twin Valley Reservoir. The EIR/EIS describes the environmental effects of constructing and operating NSCARP The EIR/EIS also fulfills the requirements of Executive Order 11988 (Floodplain Management), 11990 (Protection of Wetlands), and 12898 (Environmental Justice). For further information on this EIR/EIS, contact Mr. David Cuneo, Senior Environmental Specialist, SCWA, 404 Aviation Boulevard, Santa Rosa, California, telephone (707) 547-1935. Comments on the EIR/EIS must be provided by May 18, 2007. U.S. Department of Interior, Bureau of Reclamation, and Sonoma County Water Agency Table of Contents Table of Contents Chapter/Section Page ES EXECUTIVE SUMMARY ............................................................................................ ES-1 ES-1 PROJECT PURPOSE OBJECTIVES AND NEED .......................................... ES-1 ES-2 BACKGROUND............................................................................................... ES-2 ES-3 PUBLIC AND AGENCY INVOLVEMENT........................................................ ES-3 ES-4 APPROACH TO ALTERNATIVES DEVELOPMENT ...................................... ES-3 ES-5 ALTERNATIVES CONSIDERED IN DETAIL IN EIR/EIS ................................ ES-4 ES-6 SUMMARY OF ENVIRONMENTAL IMPACTS AND AVAILABLE MITIGATION MEASURES ................................................................................................................ ES-5 1.0 PURPOSE AND NEED FOR NSCARP .........................................................................1-1 1.1 INTRODUCTION................................................................................................1-1 1.2 PROJECT PURPOSE AND NEED.....................................................................1-3 1.3 BACKGROUND OF PURPOSE AND NEED......................................................1-3 1.4 ORGANIZATION OF EIR/EIS ............................................................................1-5 2.0 PROJECT DESCRIPTION.............................................................................................2-1 2.1 PROJECT OVERVIEW......................................................................................2-1 2.2 PROJECT ALTERNATIVES.............................................................................2-12 2.3 ENVIRONMENTAL COMMITMENTS ..............................................................2-56 2.4 PROJECT FUNDING .......................................................................................2-66 2.5 PARTICIPATION IN NSCARP .........................................................................2-67 2.6 USES OF THE ENVIRONMENTAL IMPACT REPORT/ENVIRONMENTAL IMPACT STATEMENT .....................................................................................2-67 2.7 REQUIRED PERMITS AND APPROVALS ......................................................2-68 3.0 ENVIRONMENTAL ISSUE AREAS...............................................................................3-1 3.1 AESTHETICS..................................................................................................3.1-1 3.2 AGRICULTURAL RESOURCES.....................................................................3.2-1 3.3 AIR QUALITY ..................................................................................................3.3-1 3.4 BIOLOGICAL RESOURCES...........................................................................3.4-1 3.5 CULTURAL RESOURCES..............................................................................3.5-1 3.6 ENVIRONMENTAL JUSTICE..........................................................................3.6-1 3.7 GEOLOGY AND SOILS..................................................................................3.7-1 3.8 HYDROLOGY AND WATER QUALITY...........................................................3.8-1 3.9 LAND USE/POLICY CONSISTENCY.............................................................3.9-1 3.10 NOISE ...........................................................................................................3.10-1 3.11 POPULATION AND HOUSING.....................................................................3.11-1 North Sonoma County Agricultural Reuse Project March 2007 Draft EIR/EIS -i- 0402-0741 U.S. Department of Interior, Bureau of Reclamation, and Sonoma County Water Agency Table of Contents TABLE OF CONTENTS - CONTINUED Chapter/Section Page 3.12 PUBLIC HEALTH AND SAFETY...................................................................3.12-1 3.13 RECREATION...............................................................................................3.13-1 3.14 TRANSPORTATION/TRAFFIC .....................................................................3.14-1 3.15 UTILITIES/SERVICE SYSTEMS...................................................................3.15-1 4.0 CUMULATIVE IMPACTS ..............................................................................................4-1 5.0 GROWTH-INDUCING EFFECTS...................................................................................5-1 6.0 IMPACT CONCLUSIONS..............................................................................................6-1 7.0 CONSULTATION AND COORDINATION...................................................................10-1 8.0 REFERENCES...............................................................................................................7-1 9.0 LIST OF PREPARERS ..................................................................................................8-1 10.0 ACRONYMS ..................................................................................................................9-1 LIST OF TABLES Table Title Page ES-1 Summary of Impacts and Mitigation Measures ........................................................ ES-7 1-1 Estimated Project Costs..............................................................................................1-2 2-1 Historical Gage Flows of Russian River and Dry Creek..............................................2-7 2-2 Summary of NSCARP Land Use Uses .......................................................................2-8 2-3