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BURKE-GILMAN TRAIL MISSING LINK PROJECT Final Environmental Impact Statement

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BURKE-GILMAN TRAIL MISSING LINK PROJECT Final Environmental Impact Statement BURKE-GILMAN TRAIL MISSING LINK PROJECT Final Environmental Impact Statement May 2017 BURKE-GILMAN TRAIL MISSING FINAL ENVIRONMENTAL IMPACT STATEMENT FACT SHEET Project Name Burke-Gilman Trail Missing Link Project Proposed Action The Burke-Gilman Trail (BGT) is a regional trail that runs east from Golden Gardens Park in Seattle and connects to the Sammamish River Trail in Bothell, except for a missing segment through the Ballard neighborhood. Currently, the regional trail ends at 30th Ave NW by the Hiram M. Chittenden (Ballard) Locks on the west, and begins again at the intersection of 11th Ave NW and NW 45th St on the east. The Seattle Department of Transportation (SDOT) proposes to connect these two segments of the BGT with a marked, dedicated route that would serve all users of the multi-use trail. The proposed project to complete the regional facility is referred to as the Missing Link. Project Proponent and SEPA Lead Agency Seattle Department of Transportation (SDOT) SEPA Responsible Official Scott Kubly, Director City of Seattle, Department of Transportation Contact Information c/o Mark Mazzola, Environmental Manager Seattle Department of Transportation PO Box 34996 Seattle, WA 98124‐4996 [email protected] Date of Issue of the Final Environmental Impact Statement May 25, 2017 Document Availability and Cost The Final Environmental Impact Statement (FEIS) is available online at: http://www.seattle.gov/transportation/BGT_Ballard.htm. Printed copies of the FEIS are available for review at no charge at the following locations: Seattle Department of Construction and Inspections Public Resources Center 700 5th Ave, Suite 2000 Seattle, WA 98124 BURKE-GILMAN TRAIL MISSING LINK FS-I MAY 2017 FINAL ENVIRONMENTAL IMPACT STATEMENT Seattle Public Library, Central Library 1000 4th Ave Seattle, WA 98104 Ballard Library and Ballard Neighborhood Customer Service Center 5614 and 5604 22nd Ave NW Seattle, WA 98107 Seattle Public Library, University Branch 5009 Roosevelt Way NE Seattle, WA, 98105 Seattle Public Library, Fremont Branch 731 N 35th Street Seattle, WA 98103 Seattle Public Library, Wallingford Branch 1501 N 45th Street Seattle, WA 98103 Seattle Public Library, Greenwood Branch 8016 Greenwood Ave N Seattle, WA 98103 Seattle Public Library, Magnolia Branch 2801 34th Ave W Seattle, WA 98199 Seattle Public Library, Queen Anne Branch 400 W Garfield Street Seattle, WA 98119 University of Washington Suzzallo Library University of Washington Campus Printed copies of the Executive Summary are available to the public at no charge. Printed copies of the FEIS, comment responses, and technical appendices are available for purchase by calling (206) 684-5000 or emailing [email protected]. Prices for printed volumes are: FEIS (printed copy): $50 Comments and Responses (printed copy): $50 Technical Appendices (printed copy): $50 Executive Summary (printed copy): Free The Executive Summary is available in braille free of charge by contacting SDOT at (206) 684-5000. FS-II BURKE-GILMAN TRAIL MISSING LINK MAY 2017 FINAL ENVIRONMENTAL IMPACT STATEMENT Permits, Licenses, and Approvals Likely Required for Proposal • State Environmental Policy Act (SEPA) • Seattle Shoreline Master Program Review • National Pollutant Discharge Elimination System (NPDES) Construction Stormwater General Permit Authors and Contributors A list of authors and contributors is provided in Chapter 13 of the FEIS. Location of Background Materials Background materials used in the preparation of this FEIS are listed in Chapter 12, References. Several documents are available online at the project website: http://www.seattle.gov/transportation/BGT_Ballard.htm. Environmental Review SDOT published the DEIS on June 16, 216. A 45-day comments period was open until August 1, 2016 and included public meetings on July 14, 2016 and July 16, 2016. Based on the analysis in the DEIS, with input from the public comments and meetings with area businesses and interest groups, SDOT developed the Preferred Alternative, which combines components previously analyzed in the Build Alternatives. Volume 2 of the FEIS contains the responses to the comments. Final design and permitting are expected to be completed by early 2018, with construction beginning shortly thereafter. The project is anticipated to be complete by 2019. BURKE-GILMAN TRAIL MISSING LINK FS-III MAY 2017 FINAL ENVIRONMENTAL IMPACT STATEMENT TABLE OF CONTENTS Cover Letter Fact Sheet ................................................................................................................................................. FS-1 Acronyms and Abbreviations ....................................................................................................................... IX Glossary ......................................................................................................................................................XIII Chapter 1: Project History and Alternatives .............................................................................................. 1-1 1.1 Project Background and History ................................................................................................. 1-1 1.2 Objectives ................................................................................................................................... 1-3 1.3 SEPA Process .............................................................................................................................. 1-3 1.3.1 Scoping ............................................................................................................................................... 1-3 1.4 Alternative Development ........................................................................................................... 1-4 1.4.1 Screening ........................................................................................................................................... 1-4 1.4.2 Development and Selection of the Preferred Alternative ................................................................. 1-5 1.5 No Build Alternative ................................................................................................................... 1-7 1.6 Build Alternatives ....................................................................................................................... 1-7 1.6.1 Preferred Alternative ......................................................................................................................... 1-7 1.6.2 Shilshole South Alternative ................................................................................................................ 1-8 1.6.3 Shilshole North Alternative .............................................................................................................. 1-11 1.6.4 Ballard Avenue Alternative .............................................................................................................. 1-11 1.6.5 Leary Alternative .............................................................................................................................. 1-12 1.6.6 Connector Segments ........................................................................................................................ 1-12 1.7 Features Common to All Build Alternatives ............................................................................. 1-13 1.7.1 Roadway Design and Safety Considerations .................................................................................... 1-13 1.7.2 Stormwater Management ............................................................................................................... 1-25 1.7.3 Construction Methods ..................................................................................................................... 1-25 1.8 Potential Traffic Hazards by Alternative Segment ................................................................... 1-27 1.9 Alternatives Considered but Not Included ............................................................................... 1-33 1.9.1 Facility Types .................................................................................................................................... 1-33 1.10 Comments and Reponses on the DEIS ..................................................................................... 1-34 1.10.1 Public Comment Summary .............................................................................................................. 1-34 1.10.2 Preferred Route ............................................................................................................................... 1-35 1.10.3 Project Concerns .............................................................................................................................. 1-36 1.11 Next Steps ................................................................................................................................ 1-36 Chapter 2: Geology, Soils, and Hazardous Materials ................................................................................. 2-1 2.1 Introduction................................................................................................................................ 2-1 2.2 Affected Environment ................................................................................................................ 2-1 2.2.1 Regional Setting ................................................................................................................................
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