Images

USGS Hydrologic technician Sarah Davis measuring streamflow at the South Fork Grand River near Cash, SD (streamgage 06356500) on January 31, 2019.  Measuring the streamflow under ice requires drilling holes across the width of the stream and then collecting data from each hole.  At times streams can freeze solid but drilling holes are necessary to verify t

Staff gage for Spearfish Creek at Spearfish, SD (USGS streamgage 06431500). This site was established as a U.S. Geological Survey streamgage on October 9, 1946, and is operated in cooperation with South Dakota Department of Natural Resources.

Gage house for Spearfish Creek at Spearfish, SD (USGS streamgage 06431500). This site was established as a U.S. Geological Survey streamgage on October 9, 1946, and is operated in cooperation with South Dakota Department of Natural Resources. Streamgages are visited by a USGS hydrologic technician on 6-week intervals throughout the year.

Student hydrologic technician Jackie Eldredge holding the rod over one of the known reference points 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.

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.

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.

Hydrologic technicians Sarah Davis and Jackie Eldredge preparing for a discharge measurement of the Moreau River near Faith, SD (streamgage 06359500).

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 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.

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.

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.

Water-quality sampling locations on Rapid Creek and Canyon Lake in Rapid City, SD.

A pulse of ash rises from Halema‘uma‘u as part of semi-continuous emissions at Kīlauea's summit today. Ash can be seen falling from the plume as it is blown downwind in this image, taken around 3:28 p.m. HST.

USGS Hydrologic Technician Dan Thomas preparing to measure discharge using an acoustic doppler current profiler (ADCP) with a manned boat on the Red River at Oslo, MN (streamgage 05083500) on April 25, 2018. The ADCP measures water currents with sound, using a principle of sound waves called the Doppler effect.

A group tours the fossil preparation area in the Paleontology Research Laboratory as part of
the campus tour of South Dakota School of Mines and Technology.

Jake Davis (SDGF&P) leads a field trip on April 20, 2018, looking at fish habitat improvement
projects on Rapid Creek.

Students poster contest winners for 2018. From left to right: Fleford Redoloza (2nd place),
Michaela Halvorson (tie for 3rd place), Gorky Dutt (tie for 3rd place), and Navanietha Krishnaraj (1st place).