Walsh Construction Company II holds three current contracts at the Massachusetts Water Resources Authority's Deer Island Treatment Plant, led by the US$298,197,238.72 Clarifier Rehabilitation Phase II (after Change Order 4, July 2026), which was 46.2% billed at June 30, 2026. In September and October 2026 Walsh Construction Company II won the US$5,999,400 Chemical Piping Replacement and the US$8,580,000 Cryogenic Oxygen Facility Valve Replacement.
The clarifier job
At the same date, 62.9% of the clarifier contract's time had been used. Its completion date is June 10, 2028, and MWRA has budgeted US$30 million of FY2027 spending on it.
Other names on the island
Burns & McDonnell holds the US$18.4 million design contract for a new combined heat and power plant, projected at 69.3 GWh a year. Solect won the Deer Island solar canopy, worth up to US$8,899,849, in September 2026. The US$70 million Eastern Seawall, MWRA's largest planned FY2027 award, has not yet been let; notice to proceed is targeted for May 2027.
Off the island
On the water side, Hatch holds the US$153.8 million construction management contract for the Metropolitan Water Tunnel Program and WSP the US$93.6 million final design contract, both under contract by April 2026. In June 2026 Insituform won Interceptor Renewal No. 7 in Malden and Melrose at US$12,545,692.91.
How the work is let
MWRA posts all new bids for goods, services and construction on its Supplier Portal, and bidders must register there. Awards and change orders go to Board votes; the 60 awards planned for FY2027 are worth US$508.7 million.
Where the openings are, which projects are confirmed or emerging, and what suppliers should do first are covered in the full brief. The full report, Massachusetts Water Resources Authority: Utility Account Brief, is available for USD 499. For a free overview, read the Massachusetts Water Resources Authority Utility Snapshot.