USGS Water-Year Summary 2023
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.
REVISIONS HISTORY - WSP 1279: 1938, 1941(M), 1947(M). WSP 1729: 1959(M). WDR SD-10-1: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1937 to current year (monthly discharge only for October 1937, published in WSP 1309). Daily discharge November 1937 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 3414.92 ft above NAVD88. Prior to June 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.