Agate Bay Stormwater Improvements Phase 2

September 30, 2019

Agate Bay Stormwater Improvements Phase 2:

Construction of the Agate Bay Stormwater Improvements - Phase 2 has reached substantial completion as of September 25th, 2019. The project was constructed over a 6 week period and was completed on time. The project included installing 3 water quality treatment vaults, replacing failing pipes and culverts, installing new pipes and catch basins and reducing ditch erosion. The new stormwater improvements provide immediate water quality treatment of stormwater discharging into Lake Whatcom. The prime contractor for the project was Oceanside Construction of Bellingham, WA.

For more information, contact Kevin Thompson, Engineer, Whatcom County Public Works, 360-778-6297 or [email protected].

Contact Us

  1. Stormwater/NPDES

    Whatcom County Public Works

    322 N Commercial Street
    Bellingham, WA 98225

    Email: [email protected]
    Phone:  360-778-6230

    Staff Directory


The Agate Bay Stormwater Improvement Project, Phase 2 is a part of a two year effort to provide stormwater treatment in the Agate Bay region. This project will employ strategies to remove phosphorus from stormwater generated by developed residential lots, roadways, cleared land, and landscaping. These improvements are planned primarily for stormwater that flows to the lake with little or no treatment.

The proposed improvement will consist of 3 new stormwater treatment vaults as well as new conveyance pipes and structures. In addition to water quality, the proposed improvements will improve stormwater conveyance to Lake Whatcom.

The project design is nearing the 100% design level and will go out to competitive bid in June. Construction is anticipated to being in early August 2019 and will require 2 month to complete.

Agate Bay Stormwater Improvements Phase 2 Press Release 8-14-19


For More Information on Agate Bay Stormwater Improvements Phase 1.
Construction Year:  2019

Engineer of Record: Wilson Engineering, Inc.

Engineer's Construction Estimate:  $550,000
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