PROPOSED WATER SERVICE CONTRACT GREENBERRY IRRIGATION DISTRICT WILLAMETTE RIVER BASIN PROJECT, BENTON COUNTY, OREGON DRAFT ENVIRONMENTAL ASSESSMENT U.S. DEPARTMENT OF THE INTERIOR BUREAU OF RECLAMATION PACIFIC NORTHWEST REGION LOWER COLUMBIA AREA OFFICE PORTLAND, OREGON FEBRUARY 2007 MISSION STATEMENTS The mission of the Department of the Interior is to protect and provide access to our nations natural and cultural heritage and honor our trust responsibilities to Indian tribes and our commitments of island communities. _________________________________________ The mission of the Bureau of Reclamation is to manage, develop, and protect water and related resources in an environmentally and economically sound manner in the interest of the American public. PROPOSED WATER-SERVICE CONTRACT GREENBERRY IRRIGATION DISTRICT, BENTON COUNTY, WILLAMETTE RIVER BASIN PROJECT, OREGON DRAFT ENVIRONMENTAL ASSESSMENT US BUREAU OF RECLAMATION PACIFIC NORTHWEST REGION LOWER COLUMBIA AREA OFFICE PORTLAND, OR PREPARED ON THE BEHALF OF GREENBERRY IRRIGATION DISTRICT, BENTON COUNTY, OR BY CRAVEN CONSULTANT GROUP, TIGARD, OR FEBRUARY 2007 List of Acronyms and Abbreviations ACOE U.S. Army Corps of Engineers BA biological assessment BIA Bureau of Indian Affairs, Department of the Interior cfs cubic feet per second District Greenberry Irrigation District DSL Oregon Department of State Lands EA environmental assessment EFH essential fish habitat EO Executive Order ESA Endangered Species Act ESA Endangered Species Act ESU evolutionarily significant units FWS US Fish and Wildlife Service, Department of the Interior ITA Indian Trust Assets MSA Magnuson-Stevens Fishery Conservation and Management Act NEPA National Environmental Policy Act NHPA National Historic Preservation Act NMFS National Marine Fisheries Service, US Department of Commerce ODEQ Oregon Department of Environmental Quality ODFW Oregon Department of Fish and Wildlife OWRD Oregon Water Resources Department POD point of diversion Reclamation US Bureau of Reclamation, Department of the Interior RM river mile SHPO State Historic Preservation Office USGS US Geological Survey, Department of the Interior ii CONTENTS 1. PURPOSE AND NEED FOR ACTION ...................................................... 1 1.1. BACKGROUND ..............................................................................1 1.2. PURPOSE AND NEED FOR ACTION ..................................................2 1.3. LOCATION AND GENERAL DESCRIPTION OF AFFECTED AREA...........................................................................................2 1.4. DESCRIPTION OF CURRENT FACILITIES ...........................................5 1.5. OTHER RELATED ACTIONS OR ACTIVITIES.......................................5 2. ALTERNATIVES ....................................................................................... 7 2.1. NO ACTION ALTERNATIVE..............................................................7 2.2. PROPOSED ACTION ......................................................................7 2.3. ALTERNATIVES CONSIDERED BUT ELIMINATED FROM FURTHER CONSIDERATION ..........................................................12 2.3.1. Groundwater Supplies...................................................12 2.3.2. New Dams or Other Water Storage Facilities................12 2.3.3. New Water Right for Natural Flow from Willamette .....................................................................12 2.3.4. Conservation of Existing Irrigation Water Supply ...........................................................................13 2.3.5. New Point-of-Diversion for Intake..................................13 3. AFFECTED ENVIRONMENT AND ENVIRONMENTAL CONSEQUENCES .................................................................................. 15 3.1. ECONOMICS ...............................................................................15 3.1.1. Affected Environment ....................................................15 3.1.2. Environmental Consequences ......................................16 3.2. HYDROLOGY ..............................................................................18 3.2.1. Affected Environment ....................................................18 3.2.2. Environmental Consequences ......................................20 3.3. WATER QUALITY.........................................................................22 3.3.1. Affected Environment ....................................................22 3.3.2. Environmental Consequences ......................................23 3.3.3. Mitigation Measures ......................................................24 3.4. FLOODPLAINS AND WETLANDS.....................................................25 3.4.1. Affected Environment ....................................................25 3.4.2. Environmental Consequences ......................................25 3.5. VEGETATION ..............................................................................26 3.5.1. Affected Environment ....................................................26 3.5.2. Environmental Consequences ......................................26 iii 3.5.3. Mitigation Measures.......................................................27 3.6. FISH AND WILDLIFE .....................................................................27 3.6.1. Affected Environment ....................................................27 3.6.2. Environmental Consequences.......................................28 3.7. THREATENED AND ENDANGERED SPECIES ....................................30 3.7.1. Vegetation .....................................................................30 3.7.2. Wildlife ...........................................................................31 3.7.3. Fish................................................................................33 3.8. VISUAL RESOURCES....................................................................35 3.8.1. Affected Environment ....................................................35 3.8.2. Environmental Consequences.......................................35 3.8.3. Mitigation Measures.......................................................36 3.9. RECREATION ..............................................................................36 3.9.1. Affected Environment ....................................................36 3.9.2. Environmental Consequences.......................................36 3.10. LAND USE ..................................................................................37 3.10.1. Affected Environment ....................................................37 3.10.2. Environmental Consequences.......................................37 3.11. HISTORIC PROPERTIES................................................................37 3.11.1. Affected Environment ....................................................37 3.11.2. Environmental Consequences.......................................38 3.11.3. Mitigation Measures.......................................................38 3.12. INDIAN SACRED SITES .................................................................39 3.12.1. Affected Environment ....................................................39 3.12.2. Environmental Consequences.......................................40 3.13. INDIAN TRUST ASSETS ................................................................40 3.13.1. Affected Environment ....................................................40 3.13.2. Environmental Consequences.......................................40 3.14. ENVIRONMENTAL JUSTICE............................................................41 3.14.1. Affected Environment ....................................................41 3.14.2. Environmental Consequences.......................................41 3.15. CUMULATIVE IMPACTS .................................................................42 4. CONSULTATION AND COORDINATION...............................................43 4.1. AGENCIES CONSULTED ...............................................................43 4.2. PUBLIC INVOLVEMENT .................................................................43 4.3. EA DISTRIBUTION .......................................................................46 5. LITERATURE CITED...............................................................................47 iv APPENDICES Appendix A – Figures Appendix B – Agency Correspondence Appendix C – Agency and Public Mailing List, Public Scoping Letter, News Release, and Comments Received FIGURES Figure A-1. Project Vicinity Map for Greenberry Irrigation District Figure A-2. Existing Diversion Locations Figure A-3. Existing and Proposed Irrigated Lands Figure A-4. Proposed Pipeline Route Figure A-5. Detail of Proposed Pipeline Route Figure A-6. Intake Structure Location Figure A-7. Plan View of Intake Area Figure A-8. Intake and Fish Screen Figure A-9. Slant Retrievable Intake and Fish Screen Figure A-10. Retractable T-Screen Figure A-11. Winkle Lake Outfall Structure Figure A-12. Muddy Creek Outfall Structure Figure A-13. Typical Trench for Single or Dual PVC Piping TABLES Table 2-1. Approximate Acreage in Greenberry Irrigation District.................................... 8 Table 2-2. Amount of Fill and Excavation for GID Pipeline Project................................ 11 Table 3-1. Monthly Mean Streamflow at Harrisburg, Willamette River, OR (1944­ 2004). ......................................................................................................................18 Table 3-2. Muddy Creek Watershed Area and Channel Lengths for Tributaries.