SuAsCo Watershed Dams

SuAsCo Watershed Dams

Plans have been proposed to upgrade six dams in the Sudbury-Assabet-Concord (SuAsCo) rivers watershed. Although the dams are still structurally sound and do not pose an imminent threat to public safety, today's increased land development has generated higher amounts of runoff than the dams were originally designed to handle.

The Massachusetts Department of Conservation and Recreation (DCR), which owns, operates and maintains the dams, has requested federal funding through the NRCS Watershed Rehabilitation Program to upgrade six of the nine SuAsCo dams. Another project to upgrade the George H. Nichols Dam in Westborough has already been completed.

Upgrading the dams will not only provide better flood protection, but will also maintain wetland and wildlife habitat and outdoor recreation such as nature and hiking trails. DCR and NRCS monitor the dams annually and after significant storms to ensure the safety of surrounding communities. 

These dams, originally built between 1962 and 1987 by NRCS and DCR, provide an estimated $1.7 million in annual flood damage reduction benefits to the 36 towns within the SuAsCo rivers watershed.

Plans and Environmental Assessments

The public is invited to review and provide comments on the following watershed plans and environmental assessments for the SuAsCo watershed dams. For more information or to provide comments, see the contact information at the bottom of this page.

The following document requires Acrobat Reader

Draft Supplemental Watershed Plan No. 6 & Environmental Assessment  for Rehabilitation of Hop Brook Floodwater Retarding Dam (PDF - 8 mb) - Northborough

Draft Supplemental Watershed Plan No. 8 & Environmental Evaluation for Rehabilitation of the Rawson Brook Floodwater Retarding Dam (PDF - 12 mb) - Shrewsbury

Fact sheets

The following documents require Acrobat Reader

Cold Harbor Brook Dam, Northborough
Delaney Complex Dam, Stow
George H. Nichols Dam, Westborough
Hop Brook Dam, Northborough
Lester G. Ross Dam, Berlin
Rawson Hill Brook Dam, Shrewsbury
Tyler Dam, Marlborough

For more information or to provide comments, contact:

Luis Laracuente
State Conservation Engineer

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