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Patterson Lake resident urges non‑chemical weed control near drinking‑water supply
Summary
A Patterson Lake property owner told commissioners he opposes use of certain herbicides in the Macalester Spring drinking-water district and asked the county to prefer mechanical harvesting and ground seeding instead of chemicals such as imazapyr and endothall.
A Patterson Lake property owner told Thurston County commissioners he opposes proposed herbicide use in work planned near the Macalester Spring drinking‑water district and urged the county to use mechanical harvesting and ground seeding instead.
Brett Trowbridge identified himself as a Patterson Lake resident and said his family owns several mostly undeveloped, swampy parcels that abut the lake. Trowbridge said past county maps and documents exclude some shoreline parcels from a proposed district and that recent lake‑management discussions focused on chemical controls such as endothall and imazapyr rather than harvesting.
“Both endothall and imazapyr are in the conditional” in the county documents he cited, Trowbridge said, asserting those materials flagged potential hazards. He asked the board to “just do harvesting and ground seeding” and “let’s not use any herbicides in the Macalester Spring District, our drinking water.”
The comment occurred during the public‑comment period; commissioners did not take formal action on the request at the meeting. Trowbridge provided maps and county documents to the board and offered to supply additional materials on request.
