Catalog Record

Elwha River Sediment and Sedimentation Data from Elwha Dam Removal

Results from six years of an interagency, adaptive sediment management program for the removal of Elwha and Glines Canyon dams including: (1) physical changes to the reservoirs and downstream river channel resulting from dam removal, (2) effects of dam removal on downstream water quality (sediment loads) and flood stage, (3) dam removal and reservoir drawdown methods, (4) modeling accomplished to support the EIS and adaptive management program, (5) dam operational effects on downstream discharge prior to dam removal, and (6) a literature review on potential effects of dam removal on the City of Port Angeles Ranney Well.
Generation Effort Elwha Dam Removal
Location Elwha River
Themes Environmental
Tags Reservoir Sedimentation, Monitoring, Dam Removal, Adaptive Management
Reclamation Project
Reclamation Program

Location Information

Location Name Elwha River
Location Description The Elwha River is a 45-mile (72 km) river on the Olympic Peninsula in the U.S. state of Washington. From its source at Elwha snowfinger in the Olympic Mountains, it flows generally north to the Strait of Juan de Fuca. Most of the river's course is within the Olympic National Park. From 1911 to 2014, dams blocked fish passage on the lower Elwha River. The National Park Service removed the two dams as part of the Elwha Ecosystem Restoration Project. Dam removal work began in September 2011 and was completed in August 2014.
Location Tags Elwha River, Elwha Surface Water Intake (ESWI)
Location Parent
State(s) Washington
Unified Region(s) Columbia-Pacific Northwest
Elevation [ N/A ]
Vertical Datum [ N/A ]
Coordinates (lat, long) See Location Details
Horizontal Datum WGS84