Winter Streamflow Measurement at South Fork Grand River near Cash, SD

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 that. The streamflow on   Sarah measured 6.3 cfs on the 31st.