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Ice jam on the White River near White River, SD (USGS streamgage 06447450) on March 15, 2018. Ice jams occur when floating ice carried with a stream’s current accumulate at any obstruction to the stream flow. These ice jams can develop near river bends, mouths of tributaries, areas of decreased river slope, and upstream of obstructions like bridges. Ice jams can cause upstream flooding when water builds up behind the blockage of ice and downstream flooding when the jam releases. Ice jams on the White River during spring are common. More information about this streamgage is available at https://waterdata.usgs.gov/sd/nwis/inventory/?site_no=06447450&agency_cd=USGS&.