Sammamish River Side Channel Restoration - Ph 3
#N338 #N338
Organization Lake Washington/Cedar/Sammamish Watershed (WRIA 8) Lead Entity
Sponsor City of Bothell
Status Completed
Schedule Start Date: 12/9/2015 End Date: 6/18/2018
Category Category: Restoration
DESCRIPTION
The City of Bothell constructed the Sammamish River Side Channel restoration project, located in Sammamish River Park. The site has cold water springs that provide cool water refuge during summer months. Restoration highlights: · Reconnected a 1,080 foot relic side channel and floodplain to the Sammamish River that provided accessible off-channel rearing habitat for Chinook and Coho salmon. · In stream habitat improvements included installation of thirty five log structures, five pools, and two box culverts that facilitate flows into and out of the side channel. · Enhanced six acres of riparian and wetland floodplain through control of reed canary grass and blackberry and 2.6 acres of riparian and wetland planted to enhance native forested and scrub/shrub habitat. A key project in the 2002 Sammamish River Corridor Action Plan, this proposal responded directly to the 2005 WRIA 8 Chinook Recovery Plan. The design was selected from the Sammamish Side Channel Restoration Feasibility Study (11-1517) completed in 2013 (Preferred Alt 3 with a partial of Alt 1B for riparian enhancement). Final Designs for this project were completed as part of Sammamish Side Channel Restoration Design (13-1133) completed in 2015.
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FUNDING SOURCES
FUNDING ENTRIES FROM GRANT PROJECT AGREEMENT
TypeDateFunding OrgFunding ProgramMatchAmount
Requested08/03/2015City of BothellMatch$120,434.00
Requested08/03/2015Recreation and Conservation Office (RCO)Salmon State Projects$602,324.00
Allocated12/09/2015City of BothellMatch$120,434.00
Allocated12/09/2015Recreation and Conservation Office (RCO)Puget Sound Acq. & Restoration$168,968.00
Allocated12/09/2015Recreation and Conservation Office (RCO)Salmon State Projects$433,356.00
Spent11/04/2016Recreation and Conservation Office (RCO)Puget Sound Acq. & Restoration-$168,968.00
Spent06/18/2018City of BothellMatch-$120,434.00
Spent06/18/2018Recreation and Conservation Office (RCO)Salmon State Projects-$433,356.00
Grant Project Agreement Totals Proposed Requested Allocated Spent Balance
Not entered $722,758.00 $722,758.00 $722,758.00 $0.00
OTHER FUNDING (Funding that is NOT in a grant project agreement)
TypeDateFunding OrgFunding ProgramMatchAmount
Other Funding Totals Proposed Requested Allocated Spent Balance
Grand Totals Proposed Requested Allocated Spent Balance
PRIMARY SPONSOR
PROJECT CONTACT
PROJECT MANAGER
PHOTOS

 
LOCATION
Chinook-Pop (ESU):Chinook-Puget Sound, Sammamish River, Threatened
Chum-Pop (ESU):Chum-Puget Sound/Strait of Georgia, Not Warranted
City Areas:Bothell
Coho-Pop (ESU):Coho-Puget Sound/Strait of Georgia, Species of Concern
County:King
HUC12:Bear Creek-Sammamish River (171100120304)
HUC8:Lake Washington (17110012)
Lead Entity Area:Lake Washington/Cedar/Sammamish Watershed (WRIA 8)
Legislative District:01
Pink-Pop (ESU):Pink-Odd Year, Not Warranted
Puget Sound Action Areas:South Central Puget Sound
Salmon Recovery Regions:Puget Sound
Sections:07
Sections:08
Steelhead-Pop (ESU):Steelhead-Puget Sound, North Lake Washington and Lake Sammamish, Threatened
Township:T26NR05E
Watershed Administrative Unit:Sammamish River
WRIA:Cedar - Sammamish
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Related Projects

  APPLICATION FINAL 
RESTORATION METRICS
Miles of Stream and/or Shoreline Treated or Protected (C.0.b)
0.21mi0.21mi
Instream Habitat Project    
Total Miles Of Instream Habitat Treated (C.4.b)
0.21mi0.21mi
 Channel reconfiguration and connectivity (C.4.c.1)    
Acres Of Channel/Off-Channel Connected Or Added (C.4.c.5)
0.30acres0.30acres
Instream Pools Created/Added (C.4.c.6)
5.005.00
Miles of Off-Channel Stream Created or Connected (C.4.c.4)
0.21mi0.21mi
Miles of Stream Treated for channel reconfiguration and connectivity (C.4.c.3)
0.00mi0.00mi
 Channel structure placement (C.4.d.1)    
Acres Of Streambed Treated for channel structure placement (C.4.d.4)
0.30acres
Miles of Stream Treated for channel structure placement (C.4.d.3)
0.21mi0.21mi
Number of structures placed in channel (C.4.d.7)
35.0035.00
Pools Created through channel structure placement (C.4.d.5)
5.000.00
Yards Of Average Stream-Width At Mid-Point Of Worksite (C.4.d.6)
2.00yd
Riparian Habitat Project    
*Total Riparian Acres Treated (C.5.b.2)
6.00acres2.70acres
*Total Riparian Miles Streambank Treated (C.5.b.1)
0.21mi0.21mi
 Planting (C.5.c.1)    
Acres Planted in riparian (C.5.c.3)
2.60acres2.70acres
Miles of streambank planted (C.5.c.4)
0.21mi0.21mi
 Riparian Plant removal / control (C.5.h.1)    
Acres of riparian treated for plant removal/control (C.5.h.3)
6.00acres2.70acres
Miles of streambank treated for plant removal/control (C.5.h.4)
0.21mi0.21mi
Wetland Project    
Total Acres Of Wetland Area Treated (C.8.b)
3.50acres
 Wetland improvement/ restoration (C.8.e.1)    
Acres of wetland Improved/Restored (C.8.e.2)
3.50acres
 Wetland plant removal / control (C.8.d.1)    
Acres of wetland treated for plant removal/control (C.8.d.3)
3.50acres
 Wetland planting (C.8.c.1)    
Acres of wetland planted (C.8.c.3)
3.50acres
NOTES
Property is in public ownership.

Notes from 2008:
Ideally, project would begin on east side of 102nd, go through a culvert under 102nd into wetlands/depressional areas on west side of 102 and connect with the existing side-channel on the LB of the Sammamish River. Wetlands are adjacent to 102 avenue. Effectiveness assumptions are based on this premise. Restoration of remnant side channel effecting channel width and a seasonally innudated off-channel habitat pond, riparian restoration scaled to reach length, LWD placement, and good water quality benefits due to peaty soils - Misc Toxic and nutrient enrichment leave at 0.4. Estimate about 1/4 of LB of reach affected by this project. Assuming that side channel is connected at top and bottom at most flows. Additional wetland area innudated during high flows and/or water to off-channel ponds from upland or groundwater sources.

Notes from 12/2009: The City of Bothell's CIP program in 2009 initiated a restoration action in N337 as mitigation for advers impacts to wetlands along E. River Side Dr., from a sidewalk and road improvement project. The area along the east side of 102nd Ave was treated with removal of invasive plant species, planting of native plants, and placement of a soil berm at 102nd Ave to retain water. The City's Surface Water Management Program is seeking to investigate the potential to secure funding for a design phase for N337 and N338 in 2010. The feasibility of restoring the side channel to this reach has been complicated by the recent mitigation actions.