During the winter season,
real-time discharge and gage height values may be impacted by ice
formation and backwater, while precipitation values may be impacted
by intermittent snow accumulation and subsequent melting. Use all
values as PRELIMINARY ONLY.
LOCATION.--Lat 43°06'43", long 91°15'54"
referenced to North American Datum of 1927, in NW 1/4 SE 1/4 SW 1/4
sec.24, T.96 N., R.4 W., Allamakee County, IA, Hydrologic Unit
07060001, on left bank 5 ft downstream from bridge on County Highway
X36, 7.5 mi northwest of McGregor, and 9.7 mi upstream from mouth.
DRAINAGE AREA.--221 mi2.
PERIOD OF RECORD.--Discharge records from October 1934 to
September 1951, October 2004 to current year; partial-record low-flow
measurement site from September 1957 to July 1977.
REVISED RECORDS.--WDR-US-2008: 1941 (P).
GAGE.--Water-stage recorder. Datum of gage is 661.87 ft above
National Geodetic Vertical Datum of 1929. October 1, 1934, to
September 30, 1951, datum of gage was 664.65 ft above Mean Sea Level,
general adjustment of 1912.