Hood River – White Salmon Interstate Bridge Replacement Project SDEIS
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Final Cumulative Impacts Technical Report November 2020 Prepared for: Prepared by: 851 SW Sixth Avenue Suite 1600 Portland, Oregon 97204 This page intentionally left blank. TABLE OF CONTENTS 1. Introduction .................................................................................................................................. 1 2. Project Alternatives ....................................................................................................................... 3 2.1. No Action Alternative .......................................................................................................... 6 2.2. Preferred Alternative EC-2 ................................................................................................... 8 2.3. Alternative EC-1 ................................................................................................................ 13 2.4. Alternative EC-3 ................................................................................................................ 17 2.5. Construction of the Build Alternatives ............................................................................... 21 3. Methodology ............................................................................................................................... 25 3.1. Area of Potential Impact .................................................................................................... 25 3.2. Regulations, Standards, and Guidelines ............................................................................. 25 3.3. Sources of Existing Data..................................................................................................... 26 3.4. Data Collection or Development ........................................................................................ 27 3.5. Impact Analysis Techniques ............................................................................................... 27 3.6. Agency Coordination ......................................................................................................... 27 4. Affected Environment ................................................................................................................. 28 4.1. History of the Project Vicinity ............................................................................................ 28 4.2. Regional Growth and Development Trends ....................................................................... 31 4.3. Other Current and Reasonably Foreseeable Future Actions ............................................... 35 5. Potential Cumulative Impacts by Resource .................................................................................. 35 5.1. Air Quality and Greenhouse Gases..................................................................................... 35 5.2. Historic Resources, Archaeological Resources, and Traditional Cultural Properties ............ 38 5.3. Energy ............................................................................................................................... 40 5.4. Fish and Wildlife ................................................................................................................ 41 5.5. Geology and Soils .............................................................................................................. 44 5.6. Hazardous Materials .......................................................................................................... 46 5.7. Land Use ........................................................................................................................... 47 5.8. Noise ................................................................................................................................. 48 5.9. Social, Economic, and Environmental Justice ..................................................................... 49 5.10. Park and Recreation Facilities ............................................................................................ 52 5.11. Transportation .................................................................................................................. 54 5.12. Treaty Fishing Rights.......................................................................................................... 55 5.13. Vegetation and Wetlands .................................................................................................. 58 5.14. Visual Resources ................................................................................................................ 61 5.15. Waterways and Water Quality ........................................................................................... 62 5.16. Summary of Cumulative Impacts by Resource ................................................................... 64 6. Preparers .................................................................................................................................... 66 7. References .................................................................................................................................. 66 Hood River-White Salmon Bridge Replacement Project Page i Final Cumulative Impacts Technical Report November 2020 LIST OF EXHIBITS Exhibit 1. Project Area ............................................................................................................................. 1 Exhibit 2. Location of the Preferred Alternative EC-2, Alternative EC-1, and Alternative EC-3 ................... 4 Exhibit 3. Summary Comparison of Key Elements of Alternatives ............................................................. 5 Exhibit 4. Navigation Clearance of Existing Bridge and Proposed Replacement Bridge ............................. 6 Exhibit 5. Preferred Alternative EC-2 Alignment ..................................................................................... 10 Exhibit 6. Preferred Alternative EC-2 Enlargements ............................................................................... 11 Exhibit 7. Replacement Bridge Typical Cross-Section.............................................................................. 13 Exhibit 8. Alternative EC-1 Alignment .................................................................................................... 14 Exhibit 9. Alternative EC-1 Enlargements ............................................................................................... 15 Exhibit 10. Alternative EC-3 Alignment .................................................................................................. 18 Exhibit 11. Alternative EC-3 Enlargements ............................................................................................. 19 Exhibit 12. Cumulative Impacts API ........................................................................................................ 26 Exhibit 13. Population Growth in Jurisdictions within the API ................................................................ 33 Exhibit 14. Map of Current and Reasonably Foreseeable Projects .......................................................... 36 Exhibit 15. Comparison of Direct Impacts and Restoration to Aquatic Habitat ........................................ 42 Exhibit 16. Vegetation and Wetland Impacts ......................................................................................... 60 Exhibit 17. Project Contribution to Cumulative Impacts by Resource and Recommended Mitigation ..... 64 Exhibit 18. List of Preparers ................................................................................................................... 66 ATTACHMENTS Attachment A. Current and Reasonably Foreseeable Projects Hood River-White Salmon Bridge Replacement Project Page ii Final Cumulative Impacts Technical Report November 2020 ACRONYMS AND ABBREVIATIONS APE area of potential effects API area of potential impact BMP best management practice Btus British thermal units CRGNSA Columbia River Gorge National Scenic Area CRGNSA Act Columbia River Gorge National Scenic Area Act DAS Oregon Department of Administrative Services DEQ Oregon Department of Environmental Quality DSL Oregon Department of State Lands Ecology Washington Department of Ecology EIS environmental impact statement EPA U.S. Environmental Protection Agency ESD Washington State Employment Security Department (ESD) FHWA Federal Highway Administration GHG greenhouse gas HAER Historic American Engineering Record I- Interstate Management Plan Columbia River Gorge National Scenic Area Management Plan mmBtu million British thermal units MT CO2e metric tons of carbon dioxide equivalent NAAQS National Ambient Air Quality Standards NEPA National Environmental Policy Act NRHP National Register of Historic Places NSA National Scenic Area ODFW Oregon Department of Fish and Wildlife ODOT Oregon Department of Transportation OED Oregon Employment Department OFM Washington Office of Financial Management OHWM ordinary high-water mark the Port Port of Hood River the Project Hood River-White Salmon Bridge Replacement Project RFFA reasonably foreseeable future action RTC Southwest Washington Regional Transportation Council SR State Route SWCAA Southwest Clean Air Agency TS&L type, size, and location UPRR Union Pacific Railroad USACE U.S. Army Corps of Engineers WDA workforce development area WDFW Washington Department of Fish and Wildlife WSDOT Washington State Department of Transportation Hood River-White Salmon Bridge Replacement Project Page iii Final Cumulative Impacts Technical Report November 2020 This page intentionally