LOCATION.--Lat 41°46'50", long 90°15'07" referenced to North American Datum of 1927, in SW 1/4 SE 1/4 NW 1/4 sec.34, T.81 N., R.6 E., Clinton County, IA, Hydrologic Unit 07080101, on right bank near end of 8th Avenue in Camanche, 5.0 mi upstream from Wapsipinicon River, 6.4 mi downstream from Clinton, 10.6 mi downstream from Lock and Dam 13, and 511.8 mi upstream from Ohio River. (map)

DRAINAGE AREA.--85,600 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD.--Discharge records from June to August 1873 (fragmentary), October 1873 to current year. October 1932 to September 1939, published as "at Le Claire". June 1873 to December 1932, published in the Iowa State Planning Board report "Stream-flow records of Iowa, 1873-1932".

REVISED RECORDS.--WDR IA-75-1: 1974.

GAGE.--Water-stage recorder. Datum of gage is 562.68 ft above National Geodetic Vertical Datum of 1929. June 1873 to May 31, 1934, non-recording gage, and June 1, 1934, to September 30, 1939, water-stage recorder, both at site 14.8 mi downstream at Le Claire at datum 0.07 ft lower; October 1, 1939, to September 30, 1955, water-stage recorder at site 10.6 mi upstream at Lock and Dam 13 at datum 5.48 ft higher; October 1, 1955, to June 5, 1969, water-stage recorder at same site and datum; June 6, 1969, to September 16, 1988, water-stage recorder at site 400 ft upstream at same datum; since October 1, 1958, auxiliary water-stage recorder at site 10.6 mi upstream at Lock and Dam 13 at datum 5.48 ft higher.

REMARKS.--Minor flow regulation caused by navigation dams.

WATER-QUALITY RECORDS

PERIOD OF RECORD.--Water years 1975-1987, 1995-current year.

PERIOD OF DAILY RECORD.--
SPECIFIC CONDUCTANCE: Daily instantaneous values, July 1975 to September 1976, October 1978 to September 1979, October 1979 to September 1981. Daily instantaneous values collected in conjunction with suspended-sediment samples, October 1994 to September 1997, records fragmentary.
WATER TEMPERATURE: Daily instantaneous values, July 1975 to September 1976, October 1980 to September 1981. Daily instantaneous values collected in conjunction with suspended-sediment samples, January 1995 to September 1997, records fragmentary. Daily minimum/mean/maximum, October 1977 to September 1978. Daily minimum/maximum, October 1978 to September 1980, October 1981 to September 1986, records fragmentary. Daily mean, July 2012 to current year.
SUSPENDED-SEDIMENT CONCENTRATION AND DISCHARGE: October 1994 to September 1997.

Advanced Hydrologic Prediction Service

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

City of Clinton

Exelon

National Stream Quality Accounting Network