USGS Water-Year Summary 2024
431428100192701 38N25W30BBC(RST GW WELL M-25 NR HIDDEN TIMBER, SD)
High Plains aquifer
Ogallala Formation
LOCATION - Lat 43°14'28", long 100°19'57" referenced to North American Datum of 1983, in SW 1/4 NE 1/4 SW 1/4 sec.30, T.38 N., R.25 W., Todd County, SD, Hydrologic Unit 10150006, in field 5.0 mi east northeast of Hidden Timber, 5.6 mi west of reservation boundary, and 11.8 mi southwest of Carter.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 145.4 ft. Upper casing diameter undefined; top of first opening undefined, bottom of last opening undefined.
DATUM - Land-surface datum is 2,481.95 ft above North American Vertical Datum of 1988. Measuring point: Top of well casing, 3.51 ft above land-surface datum, Aug. 1, 2014 to present.
PERIOD OF RECORD - August 2014 to present.
GAGE - Water-stage recorder.
EXTREMES FOR PERIOD OF RECORD -
Highest water level, 17.42 ft below land-surface datum, July 9, 2019. Lowest water level, 23.71 ft below land-surface datum, Apr. 10, 2015.