USGS Water-Year Summary 2021
06402500 BEAVER CREEK NEAR BUFFALO GAP, SD
LOCATION - Lat 43°28'00", long 103°18'20" referenced to North American Datum of 1927, in NE 1/4 SE 1/4 sec.05, T.7 S., R.7 E., Fall River County, SD, Hydrologic Unit 10120109, on left bank 1.5 mi south of Buffalo Gap, SD and 4.5 mi upstream from mouth.
DRAINAGE AREA - 127 mi².
- WSP 956: 1941. WSP 1309: 1939-40(M), 1947(M). WDR SD-10-1: Drainage area.
PERIOD OF RECORD - Oct. 1937 to current year. Monthly discharge only for Oct., Nov., 1957, published in WSP 1309.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 3,151.87 ft above NAVD of 1988. Prior to June 20, 1939, nonrecording gage at site 0.8 mi downstream at different datum.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood in 1927 reached a stage of 18.0 ft, former site and datum, from information by local residents.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 11,700 ft³/s, Sept. 4, 1938, from rating curve extended above 11 ft³/s, on basis of slope-area measurement, gage height, 16.46 ft (site and datum then in use); minimum daily discharge, 0.00 ft³/s, July 29, 1952, no flow at times in some years.