LOCATION.--Lat 42°25'17.8", long 92°14'47.8"
referenced to North American Datum of 1983, in SE 1/4 SW 1/4 NE 1/4
sec.21, T.88 N., R.12 W., Black Hawk County, IA, Hydrologic Unit
07080205, 0.2 mi south from intersection of Golinvaux Road and
Rottinghaus Road, and 1.4 mi southeast of Waterloo. (map)
GROUNDWATER RECORDS
WELL CHARACTERISTICS.--Depth 17.5 ft. Upper casing diameter 2 in;
top of first opening 12.5 ft, bottom of last opening 17.5 ft. Drilled
observation well, cased to 12.5 ft. All depths below land-surface
datum.
DATUM.--Land-surface datum is 822.35 ft above North American
Vertical Datum of 1988. Measuring point: top of casing, 2.12 ft above
land-surface datum, July 22, 1997, to present. Land-surface datum
from levels.
PERIOD OF RECORD.--Water-level measurements, water years 1997,
1999, 2006-2007, 2009-2015.
PERIOD OF DAILY RECORD.--Water-level records from June 2013 to
March 2015.
GAGE.--Water-level recorder.
WATER-QUALITY RECORDS
PERIOD OF RECORD.--Water years 1997, 2007.
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