LOCATION.--Lat 41°11'21", long 95°51'45" referenced to North American Datum of 1983, in SE 1/4 SE 1/4 SE 1/4 sec.23, T.74 N., R.44 W., Pottawattamie County, IA, Hydrologic Unit 10230006, on left bank near Lake Manawa State Park access road, at south edge of Council Bluffs, 0.6 mi downstream from Indian Creek, 1.5 mi upstream from Mosquito Creek, and 607.5 mi upstream from mouth. (map)

DRAINAGE AREA.--322,840 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD.--October 2006 to current year.

GAGE.--Water-stage recorder. Datum of gage is 944.09 ft above NGVD of 1929.

REMARKS.--A reliable record of stage was obtained for the year, except for January 16, 18, 21, 22.

WATER-QUALITY RECORDS

PERIOD OF RECORD.--Water year 2012.

PERIOD OF DAILY RECORD.--
SPECIFIC CONDUCTANCE: March 2006 to November 2009, July to September 2012, records fragmentary.
WATER TEMPERATURE: March 2006 to November 2009, July to September 2012, records fragmentary.
DISSOLVED OXYGEN: March 2006 to November 2009, July to September 2012, records fragmentary.
pH: March 2006 to November 2007, July to September 2012, records fragmentary.
TURBIDITY: March 2006 to November 2009, July to September 2012, records fragmentary.