USGS Water-Year Summary 2022
06418800 RAPID CREEK ABOVE WATER RECLAMATION FACILITY NEAR RAPID CITY, SD
LOCATION - Lat 44°01'36.5", long 103°06'04" referenced to North American Datum of 1983, in NE 1/4 SE 1/4 SW 1/4 sec.24, T.1 N., R.8 E., Pennington County, SD, Hydrologic Unit 10120110, gage is located on the right bank 1.5 miles downstream of the bridge on Anderson Road and 1.0 miles upstream of the Rapid City Water Reclamation Facility.
DRAINAGE AREA - 449.39 mi².
- Revisions: Discharge measurement gage height for measurement number 39 on April 26, 2019 was revised on Sept. 16, 2020 due to gage datum correction.
PERIOD OF RECORD - August 2016 to current year.
GAGE - Water stage recorder and crest-stage gage. Datum of gage is 3,003.24 ft. above NAVD of 1988.
PERIOD OF DAILY RECORD - Water Temperature: May to November 2019 (discontinued)
Specific Conductance: May to November 2019 (discontinued)
pH: May to November 2019 (discontinued)
Turbidity: May to November 2019 (discontinued)
Dissolved Oxygen: May to November 2019 (discontinued)
INSTRUMENTATION - Multi parameter water quality monitor.
EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Maximum recorded 21.7°C, Sept. 2, 2019; minimum recorded -0.1°C, Nov. 12, 2019
SPECIFIC CONDUCTANCE: Maximum record 1640 microsiemens, Nov. 13, 2019; minimum record 390 microsiemens, Aug. 11, 2019
pH: Maximum recorded 8.7 units, multiple days; minimum recorded 7.7 units, Sept. 21, 2019
TURBIDITY: Maximum recorded 461 FNU, Aug. 11, 2019; minimum recorded 0.1 FNU, multiple days
DISSOLVED OXYGEN: Maximum recorded 15.7 mg/L, Nov. 11, 2019; minimum recorded 6 mg/L, Sept. 18, 2019