LOCATION.--Lat 41°51'33", long 92°16'40" referenced to North American Datum of 1927, in SW 1/4 NW 1/4 NW 1/4 sec.5, T.81 N., R.12 W., Iowa County, IA, Hydrologic Unit 07080208, on right bank 5 ft downstream from bridge on State Highway 21, 1.7 mi south of Belle Plaine, 1.2 mi downstream from Salt Creek, and 0.9 mi downstream from Walnut Creek. (map)

DRAINAGE AREA.--2,455 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD.--Discharge records from September 1939 to September 1959, October 2014 to current year.

REVISED RECORDS.--WSP 1438: Drainage area. WSP 1558: 1940(M), 1941.

GAGE.--Water-stage recorder. Datum of gage is 749.76 ft above North American Vertical Datum of 1988. Prior to March 13, 1940, non-recording gage at same site and datum.

U.S. Army Corps of Engineers - Rock Island District