Sammamish River, North Creek, and Swamp Creek
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FINAL Shoreline Analysis Report for the Cities of Bothell and Brier Shorelines: Sammamish River, North Creek, and Swamp Creek Prepared for: City of Bothell City of Brier Planning and Community Development Community Development Department Department 9654 NE 182nd Street 2901 228th St. SW Bothell, WA 98011 Brier, Washington 98036 February 2011 FINAL CITIES OF BOTHELL & BRIER GRANT NOS. G1000013 AND G1000037 S HORELINE A NALYSIS R EPORT for the Cities of Bothell and Brier Shorelines: Sammamish River, North Creek, and Swamp Creek Prepared for: City of Bothell City of Brier Planning and Community Community Development Department Development Department 9654 NE 182nd Street 2901 228th St. SW Bothell, WA 98011 Brier, Washington 98036 Prepared by: 710 Second Avenue, Suite 550 Seattle, WA 98104 This report was funded in part February 4, 2011 through a grant from the Washington Department of Ecology. The Watershed Company Reference Number: 090615 The Watershed Company Contact Person: Amy Summe ICF International Contact Person: Lisa Grueter Printed on 30% recycled paper. Cite this document as: The Watershed Company and ICF International. February 2011. Final Shoreline Analysis Report for the Cities of Bothell and Brier Shorelines: Sammamish River, North Creek, and Swamp Creek. Prepared for the City of Bothell Community Development Department, Bothell, WA. TABLE OF C ONTENTS Page # 1 Introduction ................................................................................ 1 1.1 Background and Purpose ............................................................................... 1 1.2 Shoreline Jurisdiction ..................................................................................... 1 1.3 Study Area ....................................................................................................... 4 1.3.1 City of Bothell ...................................................................................................... 4 1.3.2 City of Brier .......................................................................................................... 4 2 Current Regulatory Framework Summary ............................... 5 2.1 Cities of Bothell and Brier .............................................................................. 5 2.2 State and Federal Regulations ....................................................................... 6 3 Elements of the Shoreline Inventory & Specific Conditions .. 8 3.1 Introduction ..................................................................................................... 8 3.2 Assessment Unit Conditions ....................................................................... 11 3.3 Data Gaps ....................................................................................................... 13 4 Analysis of Ecological Functions and Ecosystem Wide Processes ....................................................................................... 19 4.1 Geographic and Ecosystem Context (WRIA 8) ........................................... 19 4.1.1 North Creek ........................................................................................................ 20 4.1.2 Swamp Creek ..................................................................................................... 24 4.1.3 Sammamish River ............................................................................................. 26 4.2 Major Land Use Changes and Current Shoreline Condition ..................... 28 4.3 Analysis of Ecological Functions and Processes ...................................... 29 4.3.1 North Creek – Thrasher’s Corner (north of SR-524) ...................................... 32 4.3.2 North Creek – Centennial Park ......................................................................... 36 4.3.3 North Creek – Canyon Park .............................................................................. 40 4.3.4 North Creek – Fitzgerald (228th Street SE to 240th Street SE) ....................... 44 th 4.3.5 North Creek – North Creek Business Parks (240 Street SE to I-405) ......... 48 4.3.6 North Creek - Campus (I-405 to Sammamish River) ...................................... 53 4.3.7 Swamp Creek – City of Bothell and City of Brier ........................................... 58 4.3.8 Sammamish River – Reaches 9 through 14 .................................................... 63 4.3.9 Sammamish River – Bothell Business Park Floodway ................................. 70 4.4 Restoration Opportunities ............................................................................ 73 i 5 Land Use Analysis and Implications ...................................... 81 5.1 Introduction ................................................................................................... 81 5.2 Land Use Analysis ........................................................................................ 82 5.3 Shoreline Designations ................................................................................ 85 6 Public Access Analysis and Implications .............................. 87 6.1 Introduction ................................................................................................... 87 6.2 Assessment Unit Conditions ....................................................................... 88 6.3 Public Access Needs or Opportunities ....................................................... 90 6.3.1 City of Bothell .................................................................................................... 90 6.3.2 City of Brier ........................................................................................................ 91 7 Shoreline Management Recommendations ........................... 91 7.1 Shoreline Master Program ............................................................................ 91 7.1.1 Shoreline Environment Designation Provisions ............................................ 91 7.1.2 General Policies and Regulations ................................................................. 103 7.1.3 Shoreline Modification Provisions ................................................................ 106 7.1.4 Shoreline Uses ................................................................................................. 108 7.2 Restoration Plan .......................................................................................... 110 8 References .............................................................................. 112 Appendix A: City of Bothell Assessment of Shoreline Jurisdiction 1. Shoreline Jurisdiction Assessment, December 2009, The Watershed Company 2. Assessment of Upper Extent of North Creek Jurisdiction, January 2011, Washington Department of Ecology Appendix B: City of Brier Assessment of Shoreline Jurisdiction Appendix C: City of Bothell Inventory and Analysis Map Folio Figure 1. Previous Shoreline Management Area .......................................... C-1/2 Figure 2. Proposed Shoreline Management Area ......................................... C-3/4 Figure 3. Comprehensive Plan Land Use ..............................................C-5 to C-8 Figure 4. Zoning ...................................................................................C-9 to C-11 Figure 5. Current Land Use ....................................................................... C-12/13 Figure 6. Sanitary Sewer System .............................................................. C-14/15 Figure 7. Surface Water System and Outfalls ........................................... C-16/17 Figure 8. Impervious Surfaces .................................................................. C-18/19 Figure 9. Shoreline Modifications .............................................................. C-20/21 Figure 10. Public Access ........................................................................... C-22/23 Figure 11. Soils ......................................................................................... C-24/25 Figure 12. Geology .................................................................................... C-26/27 Figure 13. Floodplain and Wetlands .......................................................... C-28/29 Figure 14. Landslide and Seismic Hazard Areas ...................................... C-30/31 Figure 15. Priority Habitats & Species & Fish Distribution ........................ C-32/33 ii Figure 16. Vegetation ................................................................................ C-34/35 Figure 17. 303(d) Listed Waters and Permitted Sites ........................C-36 to C-39 Figure 18. Restoration Opportunities (Cities of Bothell and Brier) .....C-40 to C-42 Figure 19. Reach Map (Cities of Bothell and Brier) ................................... C-43/44 Figure 20. Shoreline Ecological Function ..........................................C-45 to C-56 Appendix D: City of Brier Inventory and Analysis Map Folio Proposed Shoreline Jurisdiction ........................................................................ D-1 Planned Land Use ............................................................................................. D-2 Zoning ............................................................................................................... D-3 Current Land Use ............................................................................................. D-4 Sanitary Sewer System .................................................................................... D-5 Surface and Stormwater System .....................................................................