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Roys Dam Fishway Project
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NOAA Restoration Center
Community-Based Restoration Program
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Roys Dam Fishway Project
Roys Dam Fishway Project
Up until September of 1999, Roy’s Dam in Marin County, California impaired spawning migration of adult Coho salmon and steelhead during winter stream flows. The returning Coho adults at this location represent one of the last remaining runs within the Central California Evolutionary Significant Unit (ESU). NOAA and Fish America partnered with Trout Unlimited, the Marin County Department of Public Works, the Salmon Protection and Watershed Network, Performance Excavators and numerous other local parties to modify the defunct dam. The modification involved partial removal and alteration of the 10-foot high dam and the building of grade control weirs to facilitate unrestricted upstream migration of Coho and steelhead.
Roys Dam Fishway Project
Roys Dam Fishway Project
Restoration
Roy's Dam is in Lagunitas Creek, CA and suffered from a non-functioningfish ladder. Fish were attracted to the current and did not attempt to get upthe ladder. Thus, the ladder impaired their spawning migration. This image showsthe dam and ladder bef
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Before restoration, looking upstream from Roy's Dam during a low-flow season.
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A close-up looking directly upstream at the dam which clearly shows the low flowand large drop that are impediments to fish passage upstream.
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Roy's dam before the restoration during a high flow period.
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Roy's dam in the construction phase. This image shows the creation of the poolsthat were designed to facilitate fish passage. The dam still remains buthas been breached.
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This image shows partial breeching of the dam and the initial construction ofthe pools.
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Partial breeching of the dam and construction of the pools.
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A root wad is placed in the middle of the pools to slow flow and provide habitatfor migrating fish.
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Installation of large boulders form the pools.
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At mid-construction, the main pools are already created but the streambankstabilization has not yet begun.
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Looking downstream, nearing completion of the construction.
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Work to stabilize the bank has begun.
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Looking upstream at the completed pools.
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Construction work to break the dam is just beginning.
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Workers begin to take the cement lip off the top of the dam.
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Staff from the California Department of Fish and Game, NOAA, and PerformanceExcavators attend the dedication for the Roy's Dam restoration project.
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Traditional music to welcome the salmon was played at the dedication ceremony.
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The awards ceremony at the dedication event
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There was a large community turn-out to show support and appreciation for therestoration.
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The dedication event at Roy's Dam.
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