MWRA Contract No. 8190 John J. Carroll Water Treatment Plant Carbon Dioxide System Upgrades

The Massachusetts Water Resources Authority is soliciting bids for carbon dioxide system upgrades at the John J. Carroll Water Treatment Plant in Marlborough, Massachusetts under Contract No. 8190, with general bids due September 9, 2026 and filed sub-bids (painting and electrical work) due July 31, 2026.

General bidders and filed sub-bidders must hold current Certificates of Eligibility from the Division of Capital Asset Management and Maintenance (DCAMM) with certification in Sewage and Water Treatment Plants Mechanical Systems classification and appropriate capacity rating, along with current Update Statements. The contract is not subject to MBE or WBE participation requirements. All bids must be submitted electronically through the MWRA Supplier Portal; paper bids are not accepted.

The scope includes removal and disposal of four existing vaporizers, associated control panels, CO2 piping, accessories, concrete pads, and curbing, followed by installation of two new vaporizers, control panels, CO2 piping, and accessories on a new concrete pad. The estimated project cost is $787,800. Contract documents will be posted to the MWRA Supplier Portal on or after June 24, 2026. A pre-bid conference and site visit will be held July 8, 2026 at 11:00 a.m. at the plant; interested parties must contact Benjamin Winograd at Benjamin.Winograd@mwra.com by 3:00 p.m. on July 6 to request access information. Work is performed at the John J. Carroll Water Treatment Plant in Marlborough, Massachusetts.