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Water-Year Summary for Site 06431500

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
  • For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
  • For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
  • For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
  • Not all sites have reports available for every water year.
Available Parameters
00060 Discharge(Mean)  
00065 Gage height(Mean)  

Water year 2021: 2021-10-01 to 2022-09-30

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USGS Water-Year Summary 2021
LOCATION - Lat 44°28'57", long 103°51'40" referenced to North American Datum of 1927, in SE 1/4 NW 1/4 sec.15, T.6 N., R.2 E., Lawrence County, SD, Hydrologic Unit 10120203, on right bank in city park in Spearfish, 500 ft downstream from fish hatchery and nearest tributary, and 9.8 mi upstream from mouth.
DRAINAGE AREA - 165 mi².
REVISIONS HISTORY - WDR SD-10-1: Drainage area.
PERIOD OF RECORD - Oct. 1946 to current year.
GAGE - Water-stage recorder and crest-stage gage.  Elevation of gage is 3,640 ft above NGVD of 1929, from topographic map. Prior to Dec. 5, 1946, nonrecording gage at same site and datum.
REMARKS - Accuracy of records for water years prior to 2014 are noted in the individual Annual Data Reports for those water years. For water years 2014 onward, records good except for estimated discharges, which are poor, unless otherwise noted. Regulation by fish hatchery and by hydroelectric plant 0.5 mi upstream causes diurnal fluctuation, but since storage capacity is small, daily flows are not appreciably affected. Occasional minor upstream diversions by Lead-Deadwood Sanitary District out of drainage basin into Whitewood Creek Basin. Upstream diversions by Homestake Mining Company discontinued March 2003. Satellite data-collection platform at station.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Jun. 5, 1904, reached a stage of 7.00 ft, site and datum of former gage near Spearfish, 1.0 mi upstream, drainage area, 157 mi²; discharge about 5,000 ft³/s.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 4,240 ft³/s, May 15, 1965, from rating curve extended above 520 ft³/s, on basis of slope-area discharge measurement of peak flow, gage height, 10.53 ft; minimum daily discharge, 9.0 ft³/s, Dec. 2, 1959, no flow for part of Oct. 18, 1970.