Bid No. 26-25 Cobble Mountain Unit 3 Valve Replacements

The Springfield Water and Sewer Commission is soliciting sealed bids for the Cobble Mountain Unit 3 Valve Replacements project, with an estimated value not to exceed 2,500,000 dollars. The project involves the modernization and replacement of two 1930s-era butterfly isolation valves at the Cobble Mountain Hydroelectric Station Unit 3, specifically a 72-inch diameter lower isolation valve and an 84-inch diameter upper isolation valve. The scope includes the design, manufacture, testing, and installation of these custom-fabricated valves, along with their respective Hydraulic Power Unit and Accumulator Systems. An optional bid alternate is available for the replacement of identical valves for Unit 1. The contract will be awarded to the lowest responsible bidder based on the base bid and any selected alternates. General bids are due by September 9, 2026, at 2:00 PM, following a series of mandatory pre-bid meetings and multiple addenda that revised the schedule and scope, including the removal of electrical filed sub-bid work. Bidders must provide a bid deposit of at least five percent of the bid value and are required to furnish performance and labor and materials bonds each equal to 100 percent of the total bid amount. Eligibility requires a DCAMM certificate for Mechanical Systems for general bidders. Performance must be completed within 814 calendar days from the Notice to Proceed. The project is subject to strict regulatory and funding requirements, including the Build America Buy America Act, DOE 243 Grant compliance, and potential WIFIA funding. Labor must adhere to Davis-Bacon or Massachusetts prevailing wage rates, and all onsite employees must complete a 10-hour OSHA construction safety course. Quality standards for the work are governed by ASME Sections V and VIII, as well as various ASTM and ANSI standards for castings, fasteners, and piping.