LOCATION.--Lat 41°54'39", long 93°09'48"
referenced to North American Datum of 1983, in SW 1/4 NW 1/4 SE 1/4
sec.15, T.82 N., R.20 W., Marshall County, IA, Hydrologic Unit
07080106, 250 ft east of intersection of State Highways 234 and 330,
and 0.9 mi southeast of Rhodes. (map)
GROUNDWATER RECORDS
WELL CHARACTERISTICS.--Depth 38.5 ft. Upper casing diameter 2 in;
top of first opening 13.3 ft, bottom of last opening 35.8 ft. Drilled
observation well, cased to 38.5 ft. All depths below land-surface
datum.
DATUM.--Land-surface datum is 1,017.78 ft above North American
Vertical Datum of 1988. Measuring point: top of casing, 1.84 ft above
land-surface datum, November 29, 2012, to current. Land-surface datum
from levels.
PERIOD OF RECORD.--Water-level measurements, water years
2009-2014.
PERIOD OF DAILY RECORD.--Water-level records from January 2009 to
September 2014.
GAGE.--Water-level recorder.
REMARKS.--Well depth extended from 23 to 38.5 ft on November 29,
2012.
Site Information
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U.S. Geological Survey