Get Full Government Meeting Transcripts, Videos, & Alerts Forever!
Local watershed group finds 6PPD‑quinone in bridge runoff, urges small bridge/road fixes and habitat projects
Summary
The North Coast Watershed Association reported detection of 6PPD‑quinone, a tire‑rubber byproduct toxic to coho salmon, at several stream locations in Clatsop County and outlined mitigation steps, monitoring, and habitat restoration projects funded with federal and other grants.
Graham Clague, executive director of the North Coast Watershed Association, and Kelly (researcher with the association) told the board the group detected 6PPD‑quinone — a toxic transformation product of a tire additive — in multiple stream samples collected after the first rains following dry periods.
"Every single one of those samples that was just run off had 6PPD‑Q in large amounts," Kelly said, summarizing the association’s field results for direct road runoff sampled at bridge outfalls.
Kelly described results from sampling conducted November 2022 through fall 2024 and said the research was funded in part by an EPA grant and analyzed at the Center for Urban Waters at the University of Washington Tacoma. She said the association detected 6PPD‑quinone at these sites: Bear Creek at Old Highway 30 Bridge; the Lewis and…
Already have an account? Log in
Subscribe to keep reading
Unlock the rest of this article — and every article on Citizen Portal.
- Unlimited articles
- AI-powered breakdowns of topics, speakers, decisions, and budgets
- Instant alerts when your location has a new meeting
- Follow topics and more locations
- 1,000 AI Insights / month, plus AI Chat
