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Caribou officials briefed on Mill Pond restoration plan, dredging and fishway proposal
Summary
AVS Engineering presented a plan to rebuild Mill Pond dam, dredge sediment and add a fishway; permitting and use of dredged material will drive timing and method.
SHANE MCDOUGALL, AVS Engineering, told the Caribou Planning Board on Thursday night that the city has funding and a consultant team in place to restore Mill Pond, repair the breached dam and add a fishway to reestablish upstream fish passage.
The proposal calls for dredging the shallow, sediment-filled pond, restoring the dam to its previous elevation with sheet pile and constructing a nature-style fishway; McDougall said the firm has estimated removal of about "40,000 cubic feet" of material and is targeting roughly 2 feet of dredging in the areas of exposed dry land.
The plan matters because the pond has been breached since 2018 and the project would re-create a wetland and fish passage while restoring migratory bird habitat, McDougall said. The city has federal funding for the work and staff and engineers described a permitting calendar that could stretch into late 2025 or 2026.
McDougall said the project scope has three elements: dredge the pond,…
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