LOCATION.--Lat 42°02'12", long 95°23'57"
referenced to North American Datum of 1983, in NW 1/4 NW 1/4 NW 1/4
sec.4, T.83 N., R.39 W., Crawford County, IA, Hydrologic Unit
10230007, at southwest corner of intersection of State Highway 141
and U.S. Highway 59, and 1.4 mi northwest of Denison. (map)
GROUNDWATER RECORDS
WELL CHARACTERISTICS.--Depth 48 ft. Upper casing diameter 2 in;
top of first opening 37.5 ft, bottom of last opening 47.5 ft. Drilled
observation well, cased to 48 ft. All depths below land-surface
datum.
DATUM.--Land-surface datum is 1,422.30 ft above North American
Vertical Datum of 1988. Measuring point: top of casing, 1.50 ft above
land-surface datum, April 24, 2008, to present. Land-surface datum
from levels.
PERIOD OF RECORD.--Water-level measurements, water years
2008-2015.
PERIOD OF DAILY RECORD.--Water-level records from January 2009 to
October 2014.
GAGE.--Water-level recorder.
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