Blackwater River Flood Risk Management Project in Salisbury MA

This project consists of construction of a flood risk management project around a residential neighborhood located adjacent to the Blackwater River tidal estuary in Salisbury, Massachusetts. The project site consists of an existing residential development of about 20 acres that includes approximately 135 homes located on 9th Street, 10th Street, 11th Street, 12th Street, Humphrey Avenue, Lewis Avenue, Florence Avenue, and Carter Street. Roadways within the project footprint are flooded as often as 1-2 times per month, and flooding to low lying homes is commonplace. The project consists primarily of a 3,000 linear foot vinyl sheet pile floodwall that will surround the project site and be built to elevation 7.7' NAVD88. The project will be constructed on private property within a neighborhood setting.

All required easements will be obtained by the Non-Federal sponsor prior to start of construction. Other project features include upgraded storm drain lines, concrete sidewalk, granite curb, one underground 26 CFS pumping station, one back-up 100kW power generator located in a to be constructed elevated utility building with gas and electricity connections, drainage improvements (to include 9 outlet structures, 11 catchbasins, storm drains, trench drains, water quality inlet, etc), a stone lined channel, paving (to include repaving and new pavement), site work (including excavation in the marsh, gravel fill on the landside of the wall, grading, etc.), and plantings. In order to minimize impacts to the adjacent salt marsh, construction work required to be performed in the wetland shall be completed only during the non-growing season of 1 November through 31 March, inclusive, of any year Construction mats will be used in the salt marsh to further minimize impacts.