LOCATION.--Lat 42°09'49.9", long 90°20'06.3"
referenced to North American Datum of 1983, in NE 1/4 NE 1/4 NE 1/4
sec.23, T.85 N., R.5 E., Jackson County, IA, Hydrologic Unit
07060006, on left bank on downstream side of bridge on U.S. Highway
52, 0.9 mi northwest of Green Island, and 2.2 mi upstream from mouth.
(map)
DRAINAGE AREA.--1,869 mi2.