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City of Bellevue, WA Utilities
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Lakemont Boulevard Culvert

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    Utilities Capital Projects

    • CIP Proposed Plan
    • Factoria Boulevard Stormwater Conveyance
    • Horizon View 2 Reservoir and Pump Station Project
    • Kelsey Creek/Lake Hills Culvert Project
    • Lake Hills Connector Fish Passage Improvements
    • Lakemont Blvd Culvert
    • Meydenbauer South Reservoir
    • Newport Sewer Basin Capacity Improvements
    • Pikes Peak Reservoir Replacement
    • Sewer Capital Investment Projects
    • Somerset Highlands Fire Flow Improvements
    • Somerset Reservoir Decommissioning Project
    • South Ridge Pump Station Improvements
    • Stormwater Capital Investment Projects
    • Valley Creek Culvert Replacement and Stream Restoration Project
    • Water Capital Investment Projects
    • Watershed Management Plan

    The City of Bellevue declared an emergency in 2023 and completed an emergency project (Phase 1) in June 2024 to address public safety at the Lakemont Boulevard crossing of Coal Creek. The failing culvert under Lakemont Boulevard placed the roadway at risk of failure. As a result, a new bridge was constructed over Coal Creek to ensure the stability of Lakemont Boulevard. The current project (Phase 2) addresses non-emergency culvert removal and stream restoration. 

    Why This Project is Needed

    To complete the emergency work (Phase 1), various permits were obtained. In particular, a Washington State Department of Fish and Wildlife (WDFW) Hydraulic Permit Approval (HPA) was issued to perform the emergency work. The terms and conditions of the HPA identified that  the Coal Creek culvert must be replaced with a fish passable design after Phase 1 is completed. This project, Phase 2, will remove the existing 60” diameter failed culvert and restore Coal Creek to meet this obligation.      

    Project Location

    This project is located at Lakemont Boulevard crossing Coal Creek, adjacent to the Red Town Trailhead of Cougar Mountain Regional Wildland Park. 

    Lakemont Culvert
    Lakemont Culvert at Coal Creek

    Project Funding

    The project is funded through City resources identified in the Capital Improvement Plan (CIP) Budget for Infrastructure Rehabilitation.  

    Project Phases

    Phase 1: The corrugated metal pipe carrying Coal Creek deteriorated. Additionally, storm events exacerbated embankment settlement around the culvert, creating a road safety hazard from pavement deformation. A new bridge was constructed (Oct. 2023 - June 2024) spanning the creek to provide greater structural stability to the roadway by placing its foundation outside of the influence of the culvert. 

    Phase 2: Restore the natural channel and improve fish passage and habitat in Coal Creek through the proposed bridge meeting the per guidance and requirements from the Washington State Department of Fish and Wildlife (DFDW).

    • Phase 2.1: Must-Do Cost Effectiveness Analysis – Currently underway and includes the identification of alternatives to restore Coal Creek as the existing 60-inch culvert resides on an old mine shaft cap.
    • Phase 2.2: Design – Once a preferred alternative is selected, design and permitting is expected to proceed following WDFW fish passage guidelines.
    • Phase 2.3: Construction – The final phase will involve removing the existing 60-inch failed culvert and restoring Coal Creek to a more natural condition.  

    Project Solutions (Alternatives)

    Due to the complexity of the proximity of the existing mine shaft cap under the 60-inch culvert, alternatives are still being evaluated. Ongoing updates will be provided. 

    Project Timeline

    • Phase 1: Bridge construction started Oct. 24, 2023.
    • Phase 1:  Bridge construction completed June 2024.
    • Phase 2: Must-Do Cost Effectiveness Analysis, Q1 2025 - Q4 2025
    • Phase 2: Design and Permitting, Q1 2026 – Q2 2027
    • Phase 2: Construction, Q3 2027 – Q2 2028

    Opportunities for Public Input

    A community open house will be scheduled for Q3 2025 to provide a project update on alternatives being considered and answer any questions. 

    Lakemont Culvert
    Old aging culvert under Lakemont Boulevard

     

    Utilities

    Andrew Merges, PE
    Executive MPA
    Senior Engineer | Project Manager

    Telephone
    425-229-6558
    Email
    AMerges@bellevuewa.gov

    City Manager's Office

    Michaelene Fowler
    Public Information Officer

    Telephone
    425-452-6145
    Email
    mfowler@bellevuewa.gov

    Reasonable Accommodation

    For alternate formats, interpreters, or reasonable modification requests please phone at least 48 hours in advance 425-452-6800 (voice) or email servicefirst@bellevuewa.gov. For complaints regarding modifications, contact the City of Bellevue ADA, Title VI, and Equal Opportunity Officer at ADATitleVI@bellevuewa.gov.

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