USGS Water-Year Summary 2023
06400000 HAT CREEK NEAR EDGEMONT, SD
LOCATION - Lat 43°14'24", long 103°35'16" referenced to North American Datum of 1927, in SW 1/4 SE 1/4 NE 1/4 sec.25, T.9 S., R.4 E., Fall River County, SD, Hydrologic Unit 10120108, on right bank at upstream side of bridge on State Highway 71, 2.4 mi upstream from mouth, 2.0 mi west of Heppner, and 12.5 mi southeast of Edgemont.
DRAINAGE AREA - 959 mi² of which 3 mi² probably is noncontributing.
REVISIONS HISTORY - WDR SD-10-1: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - April 1905 to September 1906, October 1950 to current year. Monthly discharge only for some periods, published in WSP 1309.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 3,297.31 ft above NAVD of 1988. Nonrecording gage Apr. 8, 1905, to May 2, 1906, at site 0.6 mi downstream and May 3 to July 7, 1906, at site 0.4 mi upstream at different datum. Nov. 6, 1950, to May 1, 1951 and July 18 to Sept. 7, 1975, non-recording gage and May 2, 1951, to July 17, 1975, recording gage, at site 0.4 mi downstream at present datum.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 15,800 ft³/s, June 6, 2015 from rating curve extended above 5,900 ft³/s on basis of contracted opening measurement of peak flow, gage height 21.19 ft. from flood marks. Minimum daily discharge, 0.00 ft³/s, Nov. 1, 1950, no flow for many days in most years.