LOCATION.--Lat 41°35'22", long 94°09'04"
referenced to North American Datum of 1927, in SE 1/4 SW 1/4 NE 1/4
sec.2, T.78 N., R.29 W., Dallas County, IA, Hydrologic Unit 07100007,
on left bank 20 ft upstream from bridge on H Avenue, 3.4 mi
downstream from bridge on U.S. Highway 6, 2.0 mi east of Redfield,
3.4 mi downstream from Middle Raccoon River, 14.3 mi upstream from
mouth, and 44.6 mi upstream from mouth of Raccoon River. (map)
DRAINAGE AREA.--994 mi2.
SURFACE-WATER RECORDS
PERIOD OF RECORD.--Discharge records from March 1940 to current
year.
REVISED RECORDS.--WSP 1438: Drainage area. WSP 1508: 1940. WDR
IA-87-1: Datum.
GAGE.--Water-stage recorder. Datum of gage is 888.88 ft above
National Geodetic Vertical Datum of 1929. Prior to June 12, 1946,
non-recording gage, and June 12, 1946, to September 30, 1986,
water-stage recorder, both at site 2.4 mi upstream at datum 7.55 ft
higher.