"The restoration of depleted fish stocks and threatened or endangered species is a high priority for fishery management in the national park system." - Final Supplemental EIS on Elwha River and Ecosystem Restoration Implementation

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Overview
Objectives
Restoration Plans for Each Species
Complete Restoration Plan
Related Publications

Ken and Mary Campbell

After the restoration of anadromous fish stocks, coho salmon will once again spawn in the Elwha River.

Overview:
Removal of two dams and restoration of the Elwha River will allow the return of anadromous fish stocks that once flourished in the river. To minimize impacts to the remaining fish in the river, all steps must be approached with caution.

As water treatment plants are built along the river, and later when the dams are removed, pulses of sediment will be released, causing short-term habitat degradation in the middle portion of the river.

To keep impacts to a minimum, construction is being done during the dry seasons.

Impacts to fish will be temporary, and anadromous populations will recover more than they ever could if the dams were retained. Check the Potential Range Map of salmonids after dam removals and restoration.

Objectives:
Restoration of anadromous fish aims to re-establish the populations of native stocks that thrived in the Elwha River before the dams were constructed.

Over the 20 to 30 years following dam removal, biologists predict that populations of anadromous stocks will rebound to historic numbers. 

The restoration strategies developed for each Elwha salmonid are intended to be adaptive and flexible, and may change based on how the fish populations respond. If one strategy proves to be unsuccessful, biologists will use another in order to produce a healthy, naturally spawning population.

Individual Restoration Plans:
Because each anadromous fish stock has its own unique life history strategy, different restoration approaches are necessary. While the individual plans may use similar techniques, each plan is specifically designed for each species.

Chinook Salmon
Chum Salmon
Coho Salmon
Pink Salmon
Sockeye Salmon
Bull Trout
Steelhead

Complete Restoration Plan (200-page PDF):
Ward, L., P. Crain, B. Freymond, M. McHenry, D. Morrill, G. Pess, R. Peters, J.A. Shaffer, B. Winter, and B. Wunderlich. 2008. Elwha River Fish Restoration Plan–Developed pursuant to the Elwha River Ecosystem and Fisheries Restoration Act, Public Law 102-495. U.S. Dept. Commer., NOAA Tech. Memo. NMFS-NWFSC-90, 168 p.

Related Publications:

S. Brenkman, G. Pess, C. Torgersen, K. Kloehn, J. Duda, and S. Corbett, "Predicting Recolonization Patterns and Interactions between Potamodromous and Anadromous Salmonids in Response to Dam Removal in the Elwha River, Washington, USA," Northwest Science, Vol. 82, Special Issue, 2008, pp. 91-106.

Patrick Connolly and Samuel Brenkman, "Fish Assemblage, Density, and Growth in Lateral Habitats Within Natural and Regulated Sections of Washington's Elwha River Prior to Dam Removal," Northwest Science, Vol. 82, Special Issue, 2008, pp. 107-118.

S. Brenkman, S. Mumford, M. House, and C. Patterson, "Establishing Baseline Information on the Geographic Distribution of Fish Pathogens Endemic in Pacific Salmonids Prior to Dam Removal and Subsequent Recolonization by Anadromous Fish in the Elwha River, Washington," Northwest Science, Vol. 82, Special Issue, 2008, pp. 142-152.