HDPE Stilling Well Fabrication and Supply

The contract involves the fabrication and supply of two high-density polyethylene stilling wells, each with a six-inch diameter, specifically engineered for deployment in delta intake environments where invasive golden mussels pose a significant risk of clogging monitoring equipment. These stilling wells are designed to protect and house water quality sondes, ensuring accurate and uninterrupted data collection by resisting biofouling and settlement from the mussels. The material selection—HDPE—is critical for its durability, chemical resistance, and smooth interior surfaces that inhibit mussel adhesion and biofilm accumulation, making it suitable for long-term use in challenging aquatic conditions. The contract is classified as a subcontract under NAICS code 325188, which pertains to other chemical product and preparation manufacturing, and is associated with the Contra Costa Water District in California. The solicitation was posted on June 12, 2026, and the place of performance is tied to delta intake systems within the state, though specific location details are not provided. The project underscores a technical focus on mitigating ecological threats to water monitoring infrastructure, emphasizing innovation in materials and design to maintain operational reliability in sensitive water resource environments.