USGS Water-Year Summary 2019
LOCATION - Lat 32°09'44", long 111°12'57" referenced to North American Datum of 1927, in SW 1/4 SW 1/4 SW 1/4 sec.34, T.14 S., R.11 E., Pima County, AZ, Hydrologic Unit 15050304, within the Avra Valley ground-water basin, approximately 2.5 mi north of Ajo Way (Highway 86), on northeast corner of Sandario and Snyder Hill. Owner: U.S. Geological Survey.
WELL CHARACTERISTICS - Depth 780 ft. Upper casing diameter 20. in; top of first opening 342 ft, bottom of last opening 779 ft.
DATUM - Land-surface datum is 2,322 ft above National Geodetic Vertical Datum of 1929. Measuring point: TOP OF PVC PIPE, 1.75 ft above land-surface datum, May 11, 2001, to present.
PERIOD OF RECORD - Aug. 1984 to current year.
GAGE - Water-level and compaction recorders.
EXTREMES FOR PERIOD OF RECORD - Highest water level recorded, 220.1 ft below land-surface datum, Sept. 13 and 14, 2015; lowest recorded, 408.9 ft below land-surface datum, July 13-14, 2004.