Lower Granite Reservoir Bed Sediment Coring and Analysis Completed
Some groups are concerned that dredging the reservoir and the confluence of the Snake and Clearwater Rivers to remove excess sediment may mobilize contaminants in sediment that could negatively affect endangered species such as steelhead and salmon.
A specially trained and equipped crew from the USGS Texas Water Science Center extracted 69 bed-sediment core samples from Lower Granite Reservoir, the Snake River, and the Clearwater River. From these 69 cores, 105 subsamples were analyzed for sediment grain size. Fifty of the subsamples were also analyzed for major and trace elements.
Below are publications associated with this project.
Grain-size distribution and selected major and trace element concentrations in bed-sediment cores from the Lower Granite Reservoir and Snake and Clearwater Rivers, eastern Washington and northern Idaho, 2010
Below are partners associated with this project.
- Overview
Some groups are concerned that dredging the reservoir and the confluence of the Snake and Clearwater Rivers to remove excess sediment may mobilize contaminants in sediment that could negatively affect endangered species such as steelhead and salmon.
A specially trained and equipped crew from the USGS Texas Water Science Center extracted 69 bed-sediment core samples from Lower Granite Reservoir, the Snake River, and the Clearwater River. From these 69 cores, 105 subsamples were analyzed for sediment grain size. Fifty of the subsamples were also analyzed for major and trace elements.
- Publications
Below are publications associated with this project.
Grain-size distribution and selected major and trace element concentrations in bed-sediment cores from the Lower Granite Reservoir and Snake and Clearwater Rivers, eastern Washington and northern Idaho, 2010
Lower Granite Dam impounds the Snake and Clearwater Rivers in eastern Washington and northern Idaho, forming Lower Granite Reservoir. Since 1975, the U.S. Army Corps of Engineers has dredged sediment from the Lower Granite Reservoir and the Snake and Clearwater Rivers in eastern Washington and northern Idaho to keep navigation channels clear and to maintain the flow capacity. In recent years, otheAuthorsChristopher L. Braun, Jennifer T. Wilson, Peter C. Van Metre, Rhonda J. Weakland, Ryan L. Fosness, Marshall L. Williams - Partners
Below are partners associated with this project.