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Milfoil appears under control; biodiversity group flags knotweed near Chaffee Sanctuary
Lyme Conservation Commission · July 13, 2026
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Summary
Commissioners reported minimal milfoil presence this season following continued removal dives and the Lyme Biodiversity Working Group raised concern about Japanese knotweed spreading south from N. Thetford Road toward Chaffee Sanctuary.
Members reported that periodic dives continue to find and remove occasional milfoil plants and that evidence of large-scale milfoil infestation is limited this year.
Meg Sheehan said the Lyme Biodiversity Working Group had no major update but commissioners discussed investigating Japanese knotweed encroaching south from N. Thetford Road toward the Chaffee Sanctuary and asked staff to look into mitigation options.
