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A wall of Didymosphenia geminata, or “rock snot,” samples stored at FWP’s Libby area office. FWP has been monitoring rock snot in the Kootenai River since 2009. (Photo courtesy Bowman Leigh)

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‘Rock snot’ algae blooms hurting Kootenai River fishery
May 8, 2022 midnight

‘Rock snot’ algae blooms hurting Kootenai River fishery

On an overcast day in mid-June last year, Jim Dunnigan, dam mitigation coordinator for Montana Fish, Wildlife and Parks, stood on a concrete embankment overlooking the Kootenai River near Libby.