Hazel Wolf Culvert Improvement Project
Hazel Wolf Culvert Improvement Project
Project Number: SW-602
Improving Fish Passage, Reducing Flooding, and Restoring Natural Flow
Project Purpose
The Hazel Wolf Culvert Improvement Project will replace an undersized culvert on W. Beaver Lake Drive to:
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Enhance fish passage
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Improve stormwater conveyance
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Reduce flooding during heavy rainfall
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Support habitat restoration and environmental resilience
Project Background
Laughing Jacob Creek crosses W. Beaver Lake Drive through an outdated culvert that obstructs fish movement and contributes to seasonal flooding. Replacing this culvert with a fish-passable, hydraulically suitable design will restore natural stream function and align with the City’s stormwater and environmental goals.
This project is a response to long-standing drainage and habitat connectivity issues and delivers benefits such as:
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Sustainable fish habitat
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Reduced maintenance costs
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Better climate resilience for storm infrastructure
Project Location
W. Beaver Lake Drive SE
Near the intersection with Laughing Jacob Creek, Sammamish, WA
Add GIS map embed or image with culvert location and stream overlay here.
Project Schedule
| Milestone | Target Date |
|---|---|
| Initiation Complete | Q3 2024 |
| Planning Complete | Q2 2025 |
| Final Design | Q1 2026 |
| Construction Start | Q2 2026 |
| Project Completion | Q4 2026 |
Project Budget
| Component | Estimate |
|---|---|
| Design Development & Documentation | $287,800 |
| Data Gathering & Reconnaissance | $153,980 |
| Permitting & Environmental Review | $96,990 |
| Property Acquisition Support | $91,210 |
| Structural Design (Optional) | $71,900 |
| Other Tasks (Mgmt, Outreach, Support) | $153,720 |
| Construction | $3,000,000 |
| Subtotal | $3,855,600 |
| Contingency (10%) | $385,560 |
| Total Estimated Cost | $4,241,160 |
What’s Included
The project includes:
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Fish-passable culvert design
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Hydrologic and hydraulic modeling
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Geotechnical investigations
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Permitting (JARPA, HPA, SEPA, ESA)
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Stakeholder engagement and outreach
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Construction & restoration of stream channel
Key Partners
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City of Sammamish Public Works
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Osborn Consulting, Inc. (design & permitting)
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WDFW, Ecology, USACE (regulatory)
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Local tribes and property owners
Key Risks & Considerations
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Permitting delays (JARPA, HPA, ESA)
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Easement acquisition from up to 6 parcels
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Unforeseen site conditions (soil, groundwater)
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Weather or contractor performance risks
Community Engagement
Outreach includes:
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Mailers, posters, and open houses
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Online updates and summaries
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Coordination with nearby residents and landowners
The City is committed to keeping the community informed and minimizing construction impacts.
