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State-led feasibility review advances for Mill Pond dam removal after site survey
Summary
The Clean Lakes Committee heard that a state-led site survey with the Department of Ecological Restoration and DOT has begun for the Mill Pond dam; the feasibility review will assess structural, sediment and ecological impacts and hold a public progress teleconference in early May.
The Clean Lakes Committee was updated that the Department of Ecological Restoration (DER) and the state Department of Transportation took part in a recent site survey for the Mill Pond dam and will lead a feasibility review to determine whether removal is practical and acceptable to the community. A committee member said DER staff emphasized that gaining neighborhood buy-in is often the major obstacle to removal, not only technical challenges.
The DER program manager on the site visit described past projects and offered to present case studies and lessons learned to local residents, the committee was told. Committee members said engineers on site began initial bathymetry and structural checks and that DOT and hydrologic specialists will review Horsley’s findings as part of the feasibility assessment.
Why it matters: the study will evaluate how removing the low, partly-buried dam could change downstream sediment flows, wetland conditions and stream morphology. Members asked the feasibility team to model what the site will look like after removal (for instance, a re-formed stream bed versus a series of smaller ponds) and to estimate how much silt could be mobilized and where it would deposit downstream.
Committee discussion included clarification of ownership and cost implications: members noted the dam structure is mainly state-owned while land under the pond is largely town- or conservation-trust-owned, which affects who would manage and fund any later work. Participants also referenced available bathymetry from a prior Corps of Engineers study (reporting years vary in prior records) and asked the feasibility team to confirm whether more recent surveys exist.
Next steps: committee members were told the feasibility-team progress review will be an online teleconference in early May (committee members identified May 4 or May 7 as possible dates) and planned to meet locally to attend. DER said it will circulate deliverables and is willing to speak at public forums to explain past removals and outcomes.
The committee did not take a formal vote on removal at the meeting; it received the status update and agreed to follow up at the teleconference and at the next regular committee meeting.
