USGS Water-Year Summary 2018
06413620 SOUTH CANYON NEAR RAPID CITY, SD
LOCATION - Lat 44°05'34", long 103°19'37" referenced to North American Datum of 1927, in NE 1/4 SW 1/4 NW 1/4 sec.31, T.2 N., R.7 E., Pennington County, SD, Hydrologic Unit 10120110, along left bank downstream of concrete culvert at the intersection of CR 234 (Nemo Road) and Echo Drive in the northwest side of Rapid City.
DRAINAGE AREA - 2.90 mi².
- WDR SD-10-1: Drainage area.
PERIOD OF RECORD - 1998-present.
GAGE - Seasonal water-stage recorder and crest-stage gage. Elevation of gage is 3,710 ft above NGVD of 1929, from topographic map. METWARN station.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 38 ft³/s, from rating curve extended above 27.5 ft³/s, on basis of slope-area measurement of peak flow, Aug.17, 2007, gage height, 4.70 ft, from floodmarks.