LOCATION.--Lat 40°49'18.7", long 92°53'27.8"
referenced to North American Datum of 1927, in NW 1/4 SE 1/4 NW 1/4
sec.35, T.70 N., R.18 W., Appanoose County, IA, Hydrologic Unit
10280201, on left bank 600 ft downstream from outlet of Rathbun Dam,
1.7 mi north of Rathbun, 3.8 mi upstream from Walnut Creek, and 30.0
mi upstream from Iowa-Missouri state line. (map)
DRAINAGE AREA.--549 mi2.
PERIOD OF RECORD.--Discharge records from October 1956 to current
year. Prior to March 1957, monthly mean discharge for some periods
published in WSP 1730.
GAGE.--Water-stage recorder. Datum of gage is 847.92 ft above
National Geodetic Vertical Datum of 1929. Prior to November 16, 1960,
non-recording gage, and November 17, 1960, to September 30, 1969,
water-stage recorder, both at site 3.1 mi downstream at datum 4.65 ft
REMARKS.--Flow regulated by Rathbun Lake (station 06903880) since
November 21, 1969. Records of discharge include flow diverted from
the reservoir to Rathbun Fish Hatchery ponds beginning July 21, 1975.
Diverted flow returns to the stream 0.1 mi downstream from gage.
Rathbun Regional Water Association permit #3663-R4 allows withdrawal
from Rathbun Dam immediately downstream from gage at a maximum rate
of 6,181 gpm (13.7 ft3/s).
PERIOD OF RECORD.--Water years 1963-1969.
PERIOD OF DAILY RECORD.--
SPECIFIC CONDUCTANCE: Daily instantaneous values collected in
conjunction with suspended-sediment samples, October 1968 to
WATER TEMPERATURE: Daily instantaneous values collected in
conjunction with suspended-sediment samples, October 1962 to
SUSPENDED-SEDIMENT CONCENTRATION AND DISCHARGE: October 1962 to
September 1969, October 1969 to September 1974. Beginning October
1969, suspended-sediment discharge records only, provided by U.S.
Army Corps of Engineers.