LOCATION.--Lat 41°55'01", long 96°08'12"
referenced to North American Datum of 1927, in SW 1/4 SW 1/4 NW 1/4
sec.18, T.82 N., R.45 W., Monona County, IA, Hydrologic Unit
10230001, on left bank of Missouri River, at end of 305th Street, and
2.5 mi west of Blencoe. (map)
GROUNDWATER RECORDS
WELL CHARACTERISTICS.--Depth 45 ft. Upper casing diameter 3 in;
top of first opening 40 ft, bottom of last opening 45 ft. Drilled
observation well, cased to 40 ft. All depths below land-surface
datum.
DATUM.--Land-surface datum is 1,032.46 ft above National Geodetic
Vertical Datum of 1929. Measuring point: top of casing, 5.19 ft above
land-surface datum, November 18, 1995, to present. Land-surface datum
from GPS.
PERIOD OF RECORD.--Water-level measurements, water years
1996-1997, 2008-2015.
PERIOD OF DAILY RECORD.--Water-level records from November 1995 to
November 1996, March to July 2006, March 2008 to June 2011, September
2011 to January 2012, August 2013 to December 2014.
GAGE.--Water-level recorder.
Site Information
