LOCATION.--Lat 40°45'13", long 91°16'37.0"
referenced to North American Datum of 1927, in NE 1/4 NE 1/4 NE 1/4
sec.26, T.69 N., R.4 W., Des Moines County, IA, Hydrologic Unit
07080107, on left bank on downstream side of bridge on County Highway
X38 in Augusta, 2.0 mi upstream from Long Creek, and 10.4 mi upstream
from mouth. (map)
DRAINAGE AREA.--4,312 mi2.
SURFACE-WATER RECORDS
PERIOD OF RECORD.--Discharge records from September to November
1913, October 1914 to current year. Prior to June 1915, monthly mean
discharge for some periods published in WSP 1308.
REVISED RECORDS.--WSP 1308: 1915 (M), 1919-27 (M), 1932-34 (M),
1936, 1937-38 (M), 1942 (M). WSP 1438: Drainage area. WDR IA-71-1:
1966 (M).
GAGE.--Water-stage recorder. Datum of gage is 521.24 ft above
National Geodetic Vertical Datum of 1929. September 30 to November
15, 1913, non-recording gage at site 400 ft upstream at datum 0.73 ft
higher; October 1, 1914, to January 14, 1935, non-recording gage at
site 400 ft upstream at same datum.
WATER-QUALITY RECORDS
PERIOD OF RECORD.--Water years 1976 to current year.
PERIOD OF DAILY RECORD.--
SPECIFIC CONDUCTANCE: Daily instantaneous values collected in
conjunction with suspended-sediment samples, October 1975 to
September 2010. Beginning October 2010, daily instantaneous values
published in combined water-quality table.
WATER TEMPERATURE: Daily instantaneous values collected in
conjunction with suspended-sediment samples, October 1975 to
September 2010. Beginning October 2010, daily instantaneous values
published in combined water-quality table.
SUSPENDED-SEDIMENT CONCENTRATION AND DISCHARGE: October 1975 to
current year.
REMARKS.--During periods of ice effect, samples are collected in
open-water channel or through ice cover. Records of specific
conductance from suspended-sediment samples are obtained at time of
laboratory analysis.
National Weather Service River
Forecast
Advanced
Hydrologic Prediction Service
U.S. Department of the Interior |
U.S. Geological Survey