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Glendale Creek Restoration. Restoration Goals. Ensure long-term stability of road and stream Manage excess gravel and debris Provide habitat/fish passage. Fish Needs. Food (Rearing) Shelter (Rearing / Refuge) Ability to Reproduce (Spawning) Access (Passage). - PowerPoint PPT Presentation
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Glendale Creek Restoration
Restoration Goals
• Ensure long-term stability of road and stream
• Manage excess gravel and debris
• Provide habitat/fish passage
Fish Needs• Food (Rearing)
• Shelter (Rearing / Refuge)
• Ability to Reproduce (Spawning)
• Access (Passage)
Habitat = Hydraulic Diversity
• Fast/slow
• Deep/shallow
Habitat Varies
• Species
• Life stage
Glendale Creek Project Areas
Road WashoutFish Passage
Lower ReachFish Passage,Spawning
Middle ReachHabitat
Road Washout
Island County (2009)• Stabilize Stream Banks• Remove Road Fill• Add Habitat Elements
Focus: Passage
Middle Reach
Tulalip Tribe (2010)• Add Large Wood• Stabilize Stream
Focus: Habitat
Lower Reach
Focus: Channel and Slope StabilityFish Passage/Spawning
Challenges in the Lower Reach
Undercut Road PrismUnstable Soils
Channel Down-CuttingNarrow Channel Segments
… More Challenges
6% Average GradeDegraded Instream Habitat
Excessive Incoming Sediment (originating in Middle Reach)
Bank Stabilization
Glendale Road
Stabilize / Replant (100 ft)(locations to be finalized)
Road Edge Stabilization(350 ft)
Upper Culvert
Bank StabilizationSpiralnail Spider Slope System
Road Edge StabilizationWelded Wire Structural Earth System
Road Edge StabilizationWelded Wire Structural Earth System - Installed
Fish Usage
Steeper and narrower(420 ft)
Wider and flatter (380 ft)
Upper Culvert
Glendale Road
• Rearing / Refuge• Spawning• Passage
Wood Structures
For fish passage For fish habitat
Rock Structures
First Steps…
Next Steps
• Design in process• Target completion in 2010• Permits• Construction bidding and contracts• Funding• Possible phased approach