USGS Water-Year Summary 2020
06430850 LITTLE SPEARFISH CREEK NEAR LEAD, SD
LOCATION - Lat 44°20'58.93", long 103°56'07.54" referenced to North American Datum of 1927, in NE 1/4 NW 1/4 SE 1/4 sec.36, T.5 N., R.1 E., Lawrence County, SD, Hydrologic Unit 10120203, on left bank 0.3 mi upstream from Savoy, 0.4 mi upstream from mouth, 0.6 mi downstream from Roughlock Falls, and 13.6 mi northwest of Lead.
DRAINAGE AREA - 27.8 mi².
- WDR SD-10-1: Drainage area.
PERIOD OF RECORD - Oct. 1988 to Sept. 1998, Oct. 1999 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 5,019.79 ft above NAVD of 1988.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 215 ft³/s, June 1, 2013, from rating curve extended above 55 ft³/s; gage height, 5.93 ft.