McCorkle Creek Detention Structure Phase 2

The contract involves a comprehensive construction project at the McCorkle Creek Detention Structure in Washington, aimed at enhancing flood control infrastructure. The scope includes raising an existing earthen detention structure by approximately 15 feet, and constructing a reinforced concrete spillway measuring about 200 feet in length and 75 feet in width. Additionally, the project entails building a reinforced concrete slide gate structure, a low flow inlet, and flow control outlet structures, all made of reinforced concrete. The work also involves installing approximately 305 linear feet of 48-inch ductile iron pipe, 125 linear feet of 12-inch HDPE pipe, and about 1,500 linear feet of gravel access roads. Other key components include plugging and abandoning 160 linear feet of existing storm pipe, installing chimney drains, staff gauges, erosion and water pollution controls, and restoring the site upon completion. The entire construction effort must be completed within 400 working days, with a contract value estimated between five and ten million dollars. Bidders are invited to submit sealed bids by November 18, 2025, following a mandatory pre-bid meeting scheduled for October 28, 2025. The project is managed by Cowlitz County under the NAICS code 237310, which pertains to water and sewer line and related structures construction. The detailed contract documents include technical specifications, bid forms, legal declarations, and appendices with permits and reports, ensuring comprehensive guidance for the successful execution of the project. The project aims to improve flood mitigation capacity and water management infrastructure, aligning with local and regional safety and environmental standards.