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A collaborative partnership formed to protect and revitalize anadromous fish populations in California by promoting collaboration among public and private sectors for fish passage improvement projects and programs

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  • Jenny Creek Man-made Barrier Removal

    This project removed an abandoned man-made concrete barrier on Jenny Creek, the largest tributary in the Klamath River’s hydroelectric reach in Siskiyou County, timed to coincide with the removal of Iron Gate Dam in 2024, to restore access for Coho salmon, Chinook salmon, steelhead, and Pacific lamprey to 1.9 miles of previously blocked habitat.

  • Mid-Klamath Tributary Fish Passage Improvement Project

    This ongoing annual project deploys field crews equipped with hand tools to assess and manually treat seasonal low-flow barriers on 30 to 40 tributaries of the Klamath and Salmon Rivers in Siskiyou and Humboldt counties, opening access to approximately 40 miles of cold-water refugia and spawning habitat each summer and fall for Chinook salmon, coho salmon, and steelhead.

  • Mid Klamath Creek Mouth Enhancement Project

    This project annually assessed and manually improved fish passage at the mouths of up to 41 cold water tributaries along a roughly 75-mile stretch of the mid-Klamath River between Weitchpec in Humboldt County and Cottonwood Creek in Siskiyou County, enhancing thermal refugia access for coho salmon, Chinook salmon, and steelhead during critical low-flow summer and fall migration periods. Location: Mainstem Klamath River tributaries from Weitchpec, Humboldt County (river mile ~143) upstream to Cottonwood Creek, Siskiyou County — a reach spanning portions of Humboldt and Siskiyou Counties on and adjacent to the Klamath National Forest. Work focused on the first 1,000…

  • Montague-Grenada Weir Retrofit & Barrier Removal

    This project modified the Montague-Grenada Weir — a concrete flow measurement structure on the mainstem Shasta River in Siskiyou County that functioned as a near year-round fish passage barrier — by raising the low-flow sill to eliminate the hydraulic drop while preserving the structure’s water measurement function. The modification improves passage for all life stages of Coho salmon, Chinook salmon, steelhead, and Pacific lamprey at river mile 14.6 on one of California’s historically most productive salmon rivers, a tributary to the Klamath River.

  • Mid Klamath Fish Passage Improvement Project

    This ongoing annual project deploys trained crews each summer to assess and manually treat fish passage barriers at the mouths of up to 72 priority tributaries to the Klamath, Salmon, and Lower Scott Rivers across Humboldt and Siskiyou Counties. Barriers including debris jams, boulder cascades, and perched alluvial deltas are modified using hand tools to create step-pool fishways, and brush bundles installed to enhance thermal refugia. The project benefits coho salmon, Chinook salmon, and steelhead, with over 80% of treated sites showing documented increases in salmonid presence post-treatment by 2022.

  • Kelly Gulch Fish Passage Project

    This project replaced an undersized culvert on Forest Service Road 40N39 on Kelly Gulch, a tributary to the North Fork Salmon River within the Klamath National Forest in Siskiyou County, with a bottomless arch culvert allowing natural passage of aquatic organisms, water, sediment, and debris. The culvert was one of the only remaining barriers to anadromous fish on the Klamath National Forest Transportation System, benefiting SONCC coho salmon, steelhead trout, and potentially Pacific lamprey.