North Dorchester Bay Combined Sewer Overflow (CSO)


The $225 million North Dorchester Bay Combined Sewer Overflow Storage (CSO) includes construction of a two-mile long tunnel being built along the north shore of North Dorchester Bay in Boston. The project also includes construction of drop shafts, diversion structures, near-surface connecting pipes, a construction/access mining shaft, a pump station and an odor control facility. PMA provided the Massachusetts Water Resource Authority (MWRA) project management support and change order and claims administration services.