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Thurston County awards $541,500 contract for Boston Harbor wastewater treatment improvements
Summary
The county awarded a $541,500 construction contract for improvements at the Boston Harbor wastewater treatment plant to Award Construction Inc. on Nov. 4. The project, partly funded by the Washington Department of Ecology, will add alkalinity dosing and mixing improvements to aid nutrient removal and includes other equipment replacements.
Thurston County's Board of County Commissioners on Nov. 4 approved a $541,500 contract to improve nutrient treatment and equipment at the Boston Harbor wastewater treatment plant.
Joe Plahuta, Public Works water and sewer engineering and operations manager, said the project will build an alkalinity addition system and mixing improvements for the plant's equalization basin "to help improve nutrient removal from the treated effluent before entering the Sound." The work also includes planned replacements of the UV disinfection system and influent valves for the sequencing batch reactors.
Funding: Plahuta told the board roughly $423,000 of the project cost for nutrient treatment is funded entirely through Washington State Department of Ecology grant revenue. The remaining work was described as funded by real estate excise tax revenue (approximately $90,000) and about $28,000 from utility rates and fees.
Board action: The board moved and seconded to award the contract to Award Construction Inc. of Ferndale, Washington, for $541,500 and authorized the director of Public Works to execute the contract and change orders for unforeseen conditions up to 10% of the contract ($54,150). The motion carried unanimously.
Why it matters: The plant discharges to Puget Sound and is being upgraded in anticipation of upcoming nutrient treatment requirements. County staff said grant funds were available through Ecology to support design and construction.
Next steps: Public Works will execute the contract and proceed to construction.
