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.