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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
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USGS Water-Year Summary 2024
404519101170301 9N 35W23BBB 1 Grainton
High Plains aquifer
Ogallala Formation
Ogallala Formation
LOCATION - Lat 40°44'27", long 101°17'04" referenced to North American Datum of 1927, in NW 1/4 NW 1/4 NW 1/4 sec.23, T.9 N., R.35 W., Perkins County, NE, Hydrologic Unit 10250004,
REVISIONS HISTORY - WDR-US-2007: 2004-2006 (Extremes for Period of Record).
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 298 ft. Upper casing diameter 5 in; top of first opening 258 ft, bottom of last opening 298 ft.
DATUM - Land-surface datum is 3,245 ft above National Geodetic Vertical Datum of 1929. Measuring point: MP is top of casing, 1.70 ft above land-surface datum, Apr. 4, 1975 to present.
PERIOD OF RECORD - March 1975 to November 29, 2016.
EXTREMES FOR PERIOD OF RECORD - Highest water level, 164.30 feet below land surface datum, March 25, 1975; lowest, 194.90 feet below land surface datum, August 18 and 19, 2016.
