USGS Water-Year Summary 2021
06402000 FALL RIVER AT HOT SPRINGS, SD
LOCATION - Lat 43°25'50", long 103°28'33" referenced to North American Datum of 1927, in NW 1/4 NW 1/4 sec.24, T.7 S., R.5 E., Fall River County, SD, Hydrologic Unit 10120109, on left retaining wall, about 175 feet downstream from the intersection of River Street and University Avenue in Hot Springs, and 6.0 mi upstream from mouth.
DRAINAGE AREA - 136 mi².
- WSP 1279: 1938, 1941(M), 1947(M). WSP 1729: 1959(M). WDR SD-10-1: Drainage area.
PERIOD OF RECORD - Oct. 1937 to current year (monthly discharge only for Oct. 1937, published in WSP 1309). Daily discharge Nov. 1937 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 3,413.20 ft above NGVD of 1929. Prior to Jun. 2, 1939, nonrecording gage at site 300 ft upstream at datum 3.00 ft higher.
EXTREMES FOR PERIOD OF RECORD - Minimum daily discharge, 14 ft³/s, May 2, 1982, also on some days in 1982, 1983, and 1985.
EXTREMES FOR PERIOD PRIOR TO REGULATION - Maximum discharge, prior to Oct. 1, 1970, 13,100 ft³/s, from rating curve extended above 60 ft³/s, on basis of weir formula and slope-area measurement of peak flow, Sept. 4, 1938, gage height, 18.40 ft, site and datum then in use; minimum daily discharge, 4.0 ft³/s, Sept. 23, 1940.