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