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The Los Angeles River Fish Passage and Habitat Structures Design (LAR FPHS) Project, and the supporting Los Angeles River Fish Passage Restoration (LAR FPR) Project, both examine potential ways to redesign the channel bed and banks in a 4.8-mile section of the Los Angeles River in the downtown city area. This pilot effort aims to provide increased flow complexity and habitat heterogeneity within a confined urban stretch of the Los Angeles River mainstem channel to enhance steelhead fish passage and migration corridors to upper tributaries (e.g., Arroyo Seco, Tujunga Creek, and others). 

This multi-agency partnership effort is funded by the State of California Wildlife Conservation Board (WCB) under a Proposition 68 Restoration Grant for Wildlife Corridors and Fish Passage Program and the Santa Monica Mountains Conservancy (SMMC) under a Proposition 1 Grant for Urban Creeks protection and enhancement. These two Projects are led by the Council for Watershed Health (CWH) and Stillwater Sciences in partnership with the City of Los Angeles as the lead agency. The Projects are in coordination with other partners and government agencies, including the U.S. Bureau of Reclamation (Reclamation), Southern California Coastal Water Research Project (SCCWRP), National Marine Fisheries Service (NMFS), U.S. Army Corps of Engineers (USACE), County of Los Angeles, California Department of Fish and Wildlife (CDFW), U.S. Fish and Wildlife Service (USFWS), Regional Water Quality Control Board (RWQCB), Arroyo Seco Foundation (ASF), and Friends of the Los Angeles River (FoLAR).

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"Recovering Steelhead Trout Populations in the L.A. River Watershed"
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Main Funders

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Project Leads


The Los Angeles River Fish Passage Projects

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Steelhead was once a common species in the Los Angeles River Watershed until the 1940s when steelhead populations drastically decreased due to the impact of excessive recreational fishing, loss and modification of freshwater habitat, and the presence of man-made physical structures and barriers.

Partners & Coordinating Agencies




It would take approximately 2–3 days for an adult steelhead to travel 20 miles, from the mouth of the Los Angeles River in Long Beach, to the project site near Boyle Heights, Los Angeles

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