USGS Water-Year Summary 2021
431428100192701 38N25W30BBC(RST GW WELL M-25 NR HIDDEN TIMBER, SD)
High Plains aquifer
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.
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 2,499 ft above National Geodetic Vertical Datum of 1929. 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, 19.01 ft below land-surface datum, June 14, 2016. Lowest water level, 23.71 ft below land-surface datum, Apr. 10, 2015.
PERIOD OF RECORD - August 2014 to current year. Published seasonal data Oct. 1 - 31 and Apr. 1 to Sept. 30.
INSTRUMENTATION - A Texas Electronics precipitation gage, paired with a Sutron Satlink V2.