LOCATION.--Lat 40°55'31", long 91°40'26.6" referenced to North American Datum of 1927, in NW 1/4 SE 1/4 NW 1/4 sec.28, T.71 N., R.7 W., Henry County, IA, Hydrologic Unit 07080107, on left bank 30 ft upstream from bridge on County Highway H46, 3.0 mi west of Oakland Mills, 2.9 mi upstream from Wolf Creek, and 4.4 mi upstream from mouth. (map)

DRAINAGE AREA.--530 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD.--Occasional low-flow measurements, water years 1957-1977; discharge records from July 1977 to current year.

GAGE.--Water-stage recorder. Datum of gage is 565.07 ft above National Geodetic Vertical Datum of 1929.

REMARKS.--Occasional high-water measurements were made by U.S. Army Corps of Engineers in 1965, 1966, 1970, and 1974 and by U.S. Geological Survey in 1966 and 1967.

Iowa DNR Geological & Water Survey

Cooperative Water Program