LOCATION.--Lat 41°29'21.84", long 93°16'41.70" referenced to North American Datum of 1983, in NE 1/4 SW 1/4 NE 1/4 sec.9, T.77 N., R.21 W., Marion County, IA, Hydrologic Unit 07100008, on left bank 75 ft south of Beardsley Drive, 4.5 mi downstream of bridge on State Highway 316, 1.6 mi northeast of Swan, 3.9 mi downstream from Camp Creek, 23.7 mi upstream from Red Rock Dam, and 162.9 mi upstream from mouth. (map)

DRAINAGE AREA.--11,700 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD.--Discharge records from October 2009 to current year. October 1985 to September 2009, at site 4.5 mi upstream and published as "near Runnells" (station 05487500). Records are not equivalent because of difference in drainage area.

GAGE.--Water-stage recorder. Datum of gage is 699.24 ft above North American Vertical Datum of 1988.

REMARKS.--Flow regulated by Saylorville Lake (station 05481630), 38.7 mi upstream. Stage-discharge relation is affected at times by backwater from Lake Red Rock (station 05488100).

WATER-QUALITY RECORDS

PERIOD OF DAILY RECORD.--
WATER TEMPERATURE: October 2011 to current year.

Advanced Hydrologic Prediction Service

Des Moines Water Works

Cooperative Water Program