USGS Water-Year Summary 2024
06412580 WILD IRISHMAN GULCH NEAR RAPID CITY, SD
LOCATION - Lat 44°04'52", long 103°21'54" referenced to North American Datum of 1927, in NW 1/4 NE 1/4 NW 1/4 sec.02, T.1 N., R.6 E., Pennington County, SD, Hydrologic Unit 10120110, on left bank about 3.0 mi west of Rapid City on Pennington County Highway 246 (Schroeder Road).
DRAINAGE AREA - 3.22 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - 1998-present.
GAGE - Seasonal water-stage recorder. Datum of gage is 4,056.22 ft above North American Vertical Datum of 1988 (NAVD88). Prior to conversion to NAVD88 datum, elevation of gage was published as 4,055 ft above NGVD of 1929, from topographic map. METWARN station.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 55 ft³/s (estimated), Aug. 17, 2007, gage height, 4.94 ft.