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The Forum is 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.

The M-G weir repair project on the Shasta River, Siskiyou County, CA

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Author: Holly Steindorf

  • Hosie Low Water Road Crossing Fish Passage Project

    This project replaced a low-water road crossing on Mormon Slough with fish-passable box culverts to improve migration conditions for federally threatened California Central Valley steelhead and fall-run Chinook salmon. Located approximately 13 miles upstream of the Calaveras River’s confluence with the San Joaquin River in San Joaquin County, the project removed one of the worst-ranked…

  • Wildcat Creek Fish Passage and Community Engagement Project (Phase 1)

    This project conducted an ecological engineering assessment of an existing, chronically clogged fish ladder on Wildcat Creek in the unincorporated North Richmond community of Contra Costa County, developed final design plans for a replacement fish passage facility to improve steelhead access to 1.1 miles of upstream habitat in a creek flowing from the Berkeley hills…

  • Ross Valley Sanitary District Shady Lane Abandoned Sewer and Barrier Removal Project

    This project removed a concrete-encased abandoned sewer line from the bed of Ross Creek in San Anselmo, Marin County, that had been acting as a 3.5-foot weir and barrier to juvenile steelhead and smolts, restoring natural channel grade and opening 8,000 linear feet of upstream spawning and rearing habitat in a tributary to Corte Madera…

  • 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…

  • Lawrence Creek Off-Channel Habitat Connection Project

    This project constructed five large wood and earthwork structures — including a Venturi jam, deflector jam, apex bar jam, inlet jam, and excavated alcove — on Lawrence Creek, a tributary to Yager Creek in the lower Van Duzen River watershed in Humboldt County, to restore hydrologic connectivity to off-channel habitats and increase low-velocity winter rearing…

  • West Tule Creek Diversion Fish Passage Project

    This project developed engineering designs for a fish-passable irrigation diversion and fish screen on West Tule Creek, a tributary to Hayfork Creek in Trinity County, to restore 1.5 miles of upstream spawning and rearing habitat for Chinook salmon, coho salmon, steelhead, and Pacific lamprey, while also improving instream flows through water transaction and irrigation efficiency…

  • Strawberry Creek at Clam Beach Fish Passage Project

    This project retrofitted a concrete flood conveyance channel adjacent to the Highway 101 culvert on Strawberry Creek near McKinleyville in Humboldt County by installing 13 angled concrete baffles to create a functional fishway, restoring 5 miles of upstream spawning and rearing habitat for steelhead, coho salmon, coastal cutthroat trout, and lamprey species. Location: Strawberry Creek,…

  • Santa Margarita River Fish Passage and Bridge Replacement

    This project replaced a low-flow river crossing at Sandia Creek Drive — the last remaining fish passage barrier on the mainstem Santa Margarita River — with a full-span bridge to restore migration access for endangered Southern California steelhead, opening 12 miles of upstream spawning and rearing habitat approximately two miles north of Fallbrook in San…

  • 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…

  • Application of FISHPass in the Smith River

    This project applied the FISHPass barrier prioritization tool to the Smith River watershed in Del Norte County, California — the largest undammed river in the state — to develop an optimized list of fish passage barrier removals for the benefit of Coho salmon, Chinook salmon, steelhead, coastal cutthroat trout, and Pacific lamprey. Field verification of…

Big River Calaveras River California State Parks Conner Creek Contra Costa County Contra Costa RCD Del Norte County Eel River Eel River Watershed Improvement Group Five Counties Salmonid Conservation Program Gold Ridge RCD Humboldt County Humboldt County Department of Public Works Humboldt County RCD Jenny Creek Klamath River Mendocino County Merced County Mid Klamath Watershed Council Mormon Slough NOAA Fisheries Outlet Creek Pacific States Marine Fisheries Commission Pescadero Creek Russian River San Joaquin County San Joaquin River San Mateo RCD Santa Barbara County Siskiyou County Smith River Sonoma County South Coast Habitat Restoration Stockton East Water District Stotenburg Creek The Watershed Project Trinity County Trinity River Trout Unlimited USDA Forest Service US Fish and Wildlife Service Van Duzen River Weaver Creek Wildcat Creek Yager Creek