Images

A U.S. Geological Survey hydrologic technician wades into the Boise River with an acoustic Doppler current profiler to measure streamflow in the river at Boise's Veterans Memorial Park, August 21, 2012, as part of a study of phosphorus mass balance.

U.S. Geological Survey hydrologic technicians prepare to use an acoustic Doppler current profiler to measure streamflow on the Boise River in Boise's Veterans Memorial Park as part of a study of phosphorus mass balance.

USGS scientists used this multiparameter display system attached to a water-quality sonde and the accompanying data sheet as they collected water-quality data from the lower Boise River near Veterans Memorial Parkway in Boise, ID.

The so-called Glory Hole on the East Fork of the South Fork Salmon River in the historical Stibnite Mining District of central Idaho. A USGS water-quality study found that the Glory Hole acts as a sediment trap, particularly at high streamflow.

Beginning April 26, the Boise River of southwestern Idaho reached flood stage. The USGS responded by installing three rapid deployment streamgages on bridges near Eagle, Star, and Parma, Idaho to provide additional information to emergency response teams. In this photo USGS hydrologic technicians install a rapid deployment streamgage on the U.S.

Beginning April 26, the Boise River of southwestern Idaho reached flood stage. The USGS responded by installing three rapid deployment streamgages on bridges near Eagle, Star, and Parma, Idaho to provide additional information to emergency response teams. In this photo USGS hydrologic technicians install a rapid deployment streamgage on the U.S.

Constructed channel features and changes in the Phase 1A side channel restoration area of the Kootenai River near Bonners Ferry, Idaho. The Kootenai Tribe of Idaho is managing a large-scale, ecosystem-based river habitat restoration effort that will be implemented over a period of 10 to 15 years across a 55-mile reach of the Kootenai River in northern Idaho.

Sceintists from the U.S. Geological Survey and the Idaho Department of Environmental Quality combined and analyzed data from two separate water-quality monitoring efforts in the upper Blackfoot River of southeastern Idaho.

Below the Garrison Dam Spillway on June 16, 2011.

Looking up at the Garrison Dam Spillway in North Dakota. In this picture you can see the darker water further back, which would be the sediment line.

Looking up at the Garrison Dam Spillway in North Dakota. In this picture you can see the darker water further back, which would be the sediment line.

The Garrison Dam Spillway located between Pick City and Riverdale, North Dakota. Photo was taken below the Spillway and it reveals the sediment line. 

Many pelicans at Garrison Dam in North Dakota.

Taken below the Garrison Dam Spillway, revealing the sediment line.

The Garrison Dam between Pick City and Riverdale, North Dakota.

Lake Darling at Foxholm, North Dakota.

Lake Darling at Foxholm, North Dakota.

Many pelicans ashore of the Garrison Dam in North Dakota.

Pelicans at the Garrison Dam in North Dakota.

Looking downstream of Tailrace, at Garrison Dam in North Dakota.

Hydropower turbines at Garrison Dam in North Dakota.