USGS Water-Year Summary 2025
06406740 SUNDAY GULCH BELOW JOHNSON CANYON, NEAR HILL CITY, SD
LOCATION - Lat 43°52'10", long 103°34'55" referenced to North American Datum of 1927, in SW 1/4 SE 1/4 SE 1/4 sec.13, T.2 S., R.4 E., Pennington County, SD, Hydrologic Unit 10120109, on left bank along State Highway 87/89 about 0.5 mi downstream from Johnson Canyon and 4.0 mi south of Hill City.
DRAINAGE AREA - 5.13 mi².
REVISIONS HISTORY - WDR SD-10-1: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - 1998-present.
GAGE - Seasonal water-stage recorder and crest-stage gage. Datum of gage is 5,400.00 ft. above North American Vertical Datum of 1988 (NAVD88). Prior to Jul. 11, 2025, at datum 8.00 ft higher. METWARN station.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 156 ft³/s, May 28, 2019, gage height 7.15 ft.