Westbrook committee weighs mosquito-ditch dredging and other coastal resiliency steps

The Town of Westbrook Coastal Resiliency Implementation Committee on July 14 reviewed components of the RLW coastal resiliency plan, focusing on the feasibility of dredging old mosquito ditches behind Seaside Avenue and other erosion-control measures.

David Murphy of RLW reported that the committee has not yet received feasibility information from Biohabitats about dredging the mosquito ditches and said it is unknown whether dredging would address the town's flooding problems. Committee members raised practical concerns about coordination, permitting requirements and the cost of dredging, including state approvals and where dredged material could be disposed of.

Members discussed alternatives and complementary measures, such as riprap for erosion control, curtain drains and raising outfalls, but emphasized that dredging is typically a state-managed program and that disposal of dredged material can pose logistical and regulatory obstacles. The committee noted that any dredging would likely require Department of Energy and Environmental Protection review and other permits.

The Duck Island breakwater was also discussed: a dive investigation has been completed and the committee is awaiting the dive report before deciding on next steps. No formal decisions were made at the meeting; the committee moved the RLW plan review later on the agenda to ensure adequate time for discussion and follow-up once consultant information arrives.

Next steps: the committee will review the Biohabitats feasibility findings when provided and expects continued discussion at future meetings. The committee's next regular meeting is scheduled for August 11, 2026.