03/13/2026 - USA | NH | HILLSBOROUGH COUNTY | MANCHESTER Midsize City
Slide Gate Replacement/ Crossover Pipe
EPD: General Contractor Qualification Statements
wastewater treatment plant secondary clarifier repairs the wwtp has three 3 secondary clarifiers. two of the clarifiers are original equipment from **** and the third is from a large facility upgrade **** three secondary clarifiers were upgraded in 2010. the clarifiers, after 16 years in service, haveexperienced failures of the carbon steel fasteners, hardware and structural members that need replacement. the clarifier 2 48inch influent slide gate has failed and cannot be operated and needs to be replaced. theother two influent clarifier gates will also be replaced under this project. also, the secondary clarifier 48inch crossover pipe has no means of isolation and the city wishes for new fabricated steel plates to beinstalled at either end to block the pipe off. all of the work associated with the slide gate replacements andblocking off the crossover pipe will require significant bypass pumping effort to maintain continuous flowthrough the plant. lastly the city also requires the plant water system is
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Prequalification packages are invited for bidding on the city of manchesters wastewater treatment plant secondary clarifier repairs project. Questions should be directed to the citys engineer underwood engineers, inc. Sealed prequalification statements will be received at the underwoodengineers concord office until 4: 00 pm est on thursday, april 9, 2026. Only prequalified firms will be allowed to bid. Project will bid in april 2026 with abid opening in may 2026, and a notice to proceed issued for work to begin in august 2026.
The bid notice states that the construction duration is 300 calendar days.
The bid notice states that the city reserves he right is reserved to waive any informalities in or reject any or all prequalifying contractors and to acceptprequalified contractors that are deemed most favorable to the interest of the city of manchester.
The bid notice states that general contractors with extensive experience in wastewater andor water treatment projects of a similarsize and scope are invited to submit prequalification packages for bidding on the city of manchesterswastewater treatment plant secondary clarifier repairs project.
The bid notice states that he estimated construction cost of this work is 2. 75 million.