Unified Interior Regions

Hydrologic technician Kammy Durham reading the elevation of a known reference point at streamgage 06404998, Grace Coolidge Creek near Game Lodge near Custer, SD. One step in ensuring consistent streamflow data is verifying that the reference elevation at the streamgage stays consistent and that any changes are documented. All of the USGS streamgages have multiple reference

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Hydrologic Technician Kammy Durham collecting water-quality samples from a well at Ellsworth Air Force Base for analysis.

Student hydrologist Todd Anderson assisting with water level measurements and purging of a well at a research location at Ellsworth Air Force Base in South Dakota. The groundwater level is measured and the well is purged prior to collecting water-quality samples from wells.

Student hydrologist Wyatt Tatge assisting with water level measurements and purging of a well at a research location at Ellsworth Air Force Base in South Dakota. The groundwater level is measured and the well is purged prior to collecting water-quality samples from wells.

Hydrologic technician Sarah Davis preparing for a discharge measurement of the Moreau River near Faith, SD (streamgage 06359500). Sarah is ensuring that the meter and weight enter into the river properly. During high flows, the USGS uses a tractor to assist in the discharge measurement where other technology like acoustics will not work due to the high sediment within the

Hydrologic technicians Sarah Davis and Jackie Eldredge preparing for a discharge measurement of the Moreau River near Faith, SD (streamgage 06359500). During high flows, the USGS uses a tractor to assist in the discharge measurement where other technology like acoustics will not work due to the high sediment within the stream and where a heavy weight is needed to keep the

USGS Hydrologic Technician Kammy Durham measuring discharge of Elk Creek near Rapid City, SD (streamgage 06407500), to capture peak flow after heavy rains during the week of June 18, 2018. The flow at this streamgage was 81 cubic feet per second on June 21, 2018. USGS staff collect streamflow information (discharge, river stage, and high water marks) on a regular basis and

USGS Hydrologic Technician Kammy Durham measuring discharge of Spring Creek near Keystone, SD (streamgage 06407500), to capture peak flow after heavy rains during the week of June 18, 2018. The flow at this streamgage was 69 cubic feet per second on June 21, 2018. USGS staff collect streamflow information (discharge, river stage, and high water marks) on a regular basis

On June 20, 2018, hydrologic technician Kammy Durham measured a discharge of 209 cubic feet per second on Whitewood Creek above Whitewood, SD (streamgage 06436180) after the watershed received about 2 inches of rain the previous evening. Streams in the Black Hills of western South Dakota can rise and fall quickly in response to rain.

On June 20, 2018, hydrologic technician Kammy Durham verified the high water mark on Whitewood Creek above Whitewood, SD (streamgage 06436180) after the watershed received about 2 inches of rain the previous evening. Streams in the Black Hills of western South Dakota can rise and fall quickly in response to rain.