LOCATION.--Lat 42°42'43", long 92°34'58" referenced to North American Datum of 1927, in SW 1/4 NW 1/4 NE 1/4 sec.11, T.91 N., R.15 W., Butler County, IA, Hydrologic Unit 07080202, on right bank 400 ft upstream from bridge on County Highway C45 in Shell Rock, 2.2 mi downstream from Curry Creek, and 10.7 mi upstream from confluence with West Fork Cedar River. (map)

DRAINAGE AREA.--1,746 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD.--Discharge records from June 1953 to current year.

REVISED RECORDS.--WSP 1438: Drainage area.

GAGE.--Water-stage recorder. Rockfill dam since October 19, 1957. Datum of gage is 885.34 ft above National Geodetic Vertical Datum of 1929.

PERIOD OF RECORD.--Water years 1988, 2001-2002, 2004, 2011-2012. Period of record includes water-quality data published in USGS annual reports and various project reports.

PERIOD OF DAILY RECORD.--
WATER TEMPERATURE: Daily maximum/minimum, June 1953 to September 1968.

Advanced Hydrologic Prediction Service

Iowa DNR Geological & Water Survey

National Streamflow Information Program