USGS Water-Year Summary 2023
364831098120201 27N-09W-19 AAC 1 GSP Refuge GW WELL 2
Alluvial aquifers
Quaternary Alluvium
LOCATION - Lat 36°48'30.91", long 98°12'02.43" referenced to North American Datum of 1983, in SE 1/4 NE 1/4 NE 1/4 sec.19, T.27 N., R.9 W., Alfalfa County, OK, Hydrologic Unit 11060004,
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 22.5 ft. Upper casing diameter 1.5 in; top of first opening 17.5 ft, bottom of last opening 22.5 ft. Drilled observation well.
DATUM - Land-surface datum is 1,136.35 ft above North American Vertical Datum of 1988. Measuring point: GALVANIZED COLLAR, 0.5 ft above land-surface datum, Sep. 3, 2013 to present. Datum of gage is 1136.35 above NAVD of 1988 determined by GNSS Level II Survey using Alltera network with RTK Trimble R-8 tied to RM-3 by USGS personnel on May 07, 2014. Measuring point: GALVANIZED COLLAR, 0.5 ft above land-surface datum, Sep. 3, 2013 to present.
PERIOD OF RECORD - Oct. 1, 2013 to present.
EXTREMES FOR PERIOD OF RECORD - Highest water level, 2.99 ft above land-surface datum, May 30, 2019; lowest water level,
8.69 ft below land-surface datum, Oct. 9, 2014.