Appendix a Plan Formulation Report
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Yolo Bypass Salmonid Habitat and Fish Restoration Project Plan Formulation Report U.S. Department of the Interior Bureau of Reclamation August 2017 Table of Contents Table of Contents 1 Introduction ...................................................................................................... 1-1 1.1 Background .......................................................................................................... 1-1 1.2 Study Area Location and Description .................................................................. 1-2 1.3 Authorization ....................................................................................................... 1-5 1.4 Problems, Opportunities, Constraints, and Objectives ........................................ 1-5 1.4.1 Problems .................................................................................................. 1-6 1.4.2 Opportunities............................................................................................ 1-8 1.4.3 Planning Constraints .............................................................................. 1-10 1.4.4 Planning Objectives ............................................................................... 1-10 1.5 Related Studies, Projects, and Programs............................................................ 1-11 1.5.1 Central Valley Flood Protection Plan .................................................... 1-11 1.5.2 American River Common Features General Reevaluation Report ........ 1-12 1.5.3 Sacramento River Bank Protection Project General Reevaluation Report ..................................................................................................... 1-12 1.5.4 California EcoRestore ............................................................................ 1-13 1.5.5 Experimental Agricultural Floodplain Habitat Investigation at Knaggs Ranch on Yolo Bypass.............................................................. 1-13 1.5.6 Lower Sacramento/Delta North Regional Flood Management Plan ..... 1-13 1.6 References .......................................................................................................... 1-14 2 Existing and Future Conditions ..................................................................... 2-1 2.1 Existing Conditions .............................................................................................. 2-1 2.1.1 Water Resources ...................................................................................... 2-1 2.1.2 Land Use and Agricultural Resources ..................................................... 2-6 2.1.3 Socioeconomics ....................................................................................... 2-9 2.1.4 Environmental Justice ............................................................................ 2-11 2.1.5 Biological Resources ............................................................................. 2-14 2.1.6 Cultural Resources ................................................................................. 2-18 2.1.7 Water Quality ......................................................................................... 2-21 2.1.8 Air Quality ............................................................................................. 2-21 2.1.9 Soils, Geology, and Mineral Resources ................................................. 2-22 2.1.10 Visual, Scenic, or Aesthetic Resources.................................................. 2-23 2.1.11 Indian Trust Assets ................................................................................ 2-24 2.1.12 Recreation .............................................................................................. 2-24 2.2 Future Without Project Conditions .................................................................... 2-30 2.3 References .......................................................................................................... 2-30 3 Alternative Formulation Process ................................................................... 3-1 3.1 Process Overview................................................................................................. 3-1 3.2 Initial Alternatives ............................................................................................... 3-3 3.2.1 Identification ............................................................................................ 3-3 3.2.2 Formulation .............................................................................................. 3-4 Draft Yolo Bypass Salmonid Habitat Restoration and Fish Passage Project EIS/EIR i Table of Contents 3.2.3 Alternative Screening............................................................................. 3-13 3.2.4 Screening Results ................................................................................... 3-24 3.2.5 Value Planning ....................................................................................... 3-25 3.3 Alternative Refinement ...................................................................................... 3-25 3.4 References .......................................................................................................... 3-26 4 Features of Alternatives .................................................................................. 4-1 4.1 Analysis Methodology ......................................................................................... 4-1 4.1.1 Hydraulic Modeling ................................................................................. 4-1 4.1.2 Fish Benefits and Fish Passage Modeling ............................................... 4-2 4.1.3 Agricultural Impact Modeling ................................................................. 4-3 4.1.4 Economic Analysis .................................................................................. 4-4 4.2 No Action Alternative .......................................................................................... 4-4 4.3 Components Common to Multiple Action Alternatives ...................................... 4-5 4.3.1 Agricultural Road Crossing 1 and Cross-Canal Berms ........................... 4-5 4.3.2 Downstream Channel Improvements ....................................................... 4-7 4.3.3 Operational Timeframe ............................................................................ 4-8 4.3.4 Best Management Practices ..................................................................... 4-9 4.4 Alternative 1: East Side Gated Notch ................................................................ 4-12 4.4.1 Facilities ................................................................................................. 4-13 4.4.2 Construction Methods ............................................................................ 4-21 4.4.3 Operations .............................................................................................. 4-24 4.4.4 Inspection and Maintenance .................................................................. 4-25 4.4.5 Monitoring and Adaptive Management ................................................. 4-26 4.4.6 Alternative 1 Preliminary Costs ............................................................. 4-27 4.5 Alternative 2: Central Gated Notch ................................................................... 4-27 4.5.1 Facilities ................................................................................................. 4-28 4.5.2 Construction Methods ............................................................................ 4-31 4.5.3 Operations .............................................................................................. 4-32 4.5.4 Inspection and Maintenance .................................................................. 4-33 4.5.5 Monitoring and Adaptive Management ................................................. 4-33 4.5.6 Alternative 2 Preliminary Costs ............................................................. 4-33 4.6 Alternative 3: West Side Gated Notch ............................................................... 4-33 4.6.1 Facilities ................................................................................................. 4-35 4.6.2 Construction Methods ............................................................................ 4-37 4.6.3 Operations .............................................................................................. 4-39 4.6.4 Inspection and Maintenance .................................................................. 4-39 4.6.5 Monitoring and Adaptive Management ................................................. 4-40 4.6.6 Alternative 3 Preliminary Costs ............................................................. 4-40 4.7 Alternative 4: West Side Gated Notch – Managed Flow ................................... 4-40 4.7.1 Facilities ................................................................................................. 4-42 4.7.2 Construction Methods ............................................................................ 4-46 4.7.3 Operations .............................................................................................. 4-48 4.7.4 Inspection and Maintenance .................................................................. 4-48 4.7.5 Monitoring and Adaptive Management ................................................. 4-49 4.7.6 Alternative 4 Preliminary Costs ............................................................