Site work for a water / sewer project in Westfield, Massachusetts. Completed plans call for site work for a water / sewer project.

Cobble Mountain Unit 3 Valve Replacements at the Cobble Mountain Powerhouse (Project #26-25) involves replacing valves at the specified location. Bids from subcontractors will be accepted for plumbing and electrical work. General contractors must attend a mandatory pre-bid conference/site visit. Subcontractor bids require a bid deposit and must be submitted by the specified deadline. Prime/general contractor bids will also be accepted, with both bid types being publicly opened and read. Documents must be reviewed carefully and electronic document downloads require registration as a Plan Holder to receive notifications of project addenda. The Cobble Mountain Hydroelectric Station Unit 3 uses two large butterfly isolation valves, an electric motoroperated Upper Isolation Valve and a hydraulically controlled Lower Isolation Valve-for penstock and turbine shutoff. Both valves, original to the 1930s, are corroded, leak excessively, and have surpassed their design life, prompting a modernization project to replace them and the associated components with modern equipment rated for a 50-year lifespan. The new valves will be custom fabricated to fit the same footprint as the existing valves, eliminating the need for penstock modifications. The Project is estimated not to exceed $2,500,000. The procurement specifications include an alternative bid option to obtain cost and schedule information for also replacing Unit 1 valves, identical to the Unit 3 scope. Question Deadline 04/17/2026 at 4:30 PM ET All questions of Prime/General Contractor must be made in writing and received by the SWSC Chief Procurement Officer, Edward J. Sweeney via the following contact: edward.sweeney@waterandsewer.org.