The federally mandated Boston Harbor Cleanup required the City of Cambridge to complete sewer separation and stormwater management measures to protect the Alewife Brook and Little River from combined sewer overflows (CSOs), flooding, and polluting runoff. Kleinfelder and two partner firms employed innovative approaches to science, engineering, and construction to concurrently resolve infrastructure problems, enhance the environment, and provide new open-space resources to the community.
The project employed multiple innovations, incorporating conventional and bioengineered approaches. The stormwater wetland enables the sewer separation and infrastructure renewal for 420 acres of catchment area and reduces CSOs to the river by 43.6 million gallons annually. It also took a parcel considered wasteland, improved its ecological health, and transformed it into a beautiful urban park.