USGS Water-Year Summary 2021
06410500 RAPID CREEK ABOVE PACTOLA RESERVOIR, AT SILVER CITY, SD
LOCATION - Lat 44°05'05", long 103°34'48" referenced to North American Datum of 1927, in SW 1/4 SE 1/4 sec.36, T.2 N., R.4 E., Pennington County, SD, Hydrologic Unit 10120110, on right bank, 0.8 mi west of Silver City, and 3.0 mi downstream from Slate Creek.
DRAINAGE AREA - 293 mi².
- WDR SD-10-1: Drainage area.
PERIOD OF RECORD - Oct. 1953 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of the gage is 4620.59 ft above North American Vertical Datum of 1988 (NAVD88). Datum was converted to NAVD88 datum using the National Geodetic Surveys VDATUM transformation tool in Sept. 2020. Prior to October 1, 2020, datum was published as 4620.00 ft above NGVD of 1929 (Bureau of Reclamation bench mark).
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 2,060 ft³/s, from rating curve extended above 1,000 ft³/s, on basis of slope-area measurement of peak flow, May 15, 1965, gage height, 10.44 ft.