LOCATION.--Lat 41°49'11.0", long 92°05'54.4"
referenced to North American Datum of 1983, in SW 1/4 SE 1/4 SW 1/4
sec.14, T.81 N., R.11 W., Iowa County, IA, Hydrologic Unit 07080208,
at edge of gravel access road, 0.2 mi west and 0.7 mi south from
intersection of County Highway F15 and KK Avenue, and 1.3 mi
northwest of Marengo. (map)
GROUNDWATER RECORDS
WELL CHARACTERISTICS.--Depth 22.5 ft. Upper casing diameter 2 in;
top of first opening 19.5 ft, bottom of last opening 22.5 ft. Drilled
observation well, cased to 19.5 ft. All depths below land-surface
datum.
DATUM.--Land-surface datum is 738.48 ft above North American
Vertical Datum of 1988. Measuring point: top of casing, 6.80 ft above
land-surface datum, September 30, 2013, to present. Land-surface
datum from lidar digital elevation model.
PERIOD OF RECORD.--Water-level measurements, water years
1985-1986, 1996, 2001, 2009, 2012-2015.
PERIOD OF DAILY RECORD.--Water-level records from November 2012 to
May 2015.
GAGE.--Water-level recorder.
WATER-QUALITY RECORDS
PERIOD OF RECORD.--Water years 1985, 1986, 1996, 1998, 2009,
2011.
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