USGS Water-Year Summary 2020
06421500 RAPID CREEK NEAR FARMINGDALE, SD
LOCATION - Lat 43°56'31.61", long 102°51'12.50" referenced to North American Datum of 1927, in SW 1/4 SW 1/4 SW 1/4 sec.19, T.1 S., R.11 E., Pennington County, SD, Hydrologic Unit 10120110, on right bank at downstream side of bridge, 2 mi southeast of Farmingdale, and 4.8 mi downstream from Antelope Creek.
DRAINAGE AREA - 603 mi².
- WDR SD-10-1: Drainage area. The maximum discharge for calendar and water year 2010 has been revised to 3,750 ft³/s, May 24, 2010, from rating curve extended above 2,700 ft³/s, gage height 12.69 ft. Revised daily discharges, in cubic feet per second, for period in May 2010 are given below. These figures supersede those published in the 2010 Water Year Summary.
May 24 1,250
May 25 1,750
May 26 864
PERIOD OF RECORD - July 1946 to current year. October 1989 to September 1990, operated as a partial-record crest-stage gage.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 2,699.74 ft above NAVD of 1988. Prior to Sept. 19, 1947, nonrecording gage at same site and datum.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge prior to regulation, 2,640 ft³/s, June 21, 1947, gage height, 8.40 ft; maximum discharge after regulation, 7,320 ft³/s, June 10, 1972, from rating curve extended above 400 ft³/s, on basis of contracted-opening and flow-over-road measurement of peak flow, gage height, 11.85 ft, from floodmarks; minimum daily discharge, 0.00 ft³/s, May 30, 1969, no flow at times in some years.