LOCATION.--Lat 41°32'02", long 93°56'59"
referenced to North American Datum of 1927, in SE 1/4 SW 1/4 SW 1/4
sec.22, T.78 N., R.27 W., Dallas County, IA, Hydrologic Unit
07100006, on right bank 160 ft downstream from bridge on County
Highway R16, 0.3 mi northeast of Van Meter, 0.7 mi upstream from
small left bank tributary, 1.2 mi downstream from confluence of North
and South Raccoon Rivers, and 29.3 mi upstream from mouth. (map)
DRAINAGE AREA.--3,441 mi2.
SURFACE-WATER RECORDS
PERIOD OF RECORD.--Discharge records from April 1915 to current
year. Prior to October 1933, monthly mean discharge for some periods
published in WSP 1308.
REVISED RECORDS.--WSP 1308: 1927 (M). WSP 1438: Drainage area. WSP
1508: 1915 (M), 1925 (M), 1926, 1933 (M), 1939 (M), 1947 (M), 1949
(M).
GAGE.--Water-stage recorder. Datum of gage is 841.16 ft above
National Geodetic Vertical Datum of 1929. Prior to October 1, 1915,
non-recording gage at same site at datum 2.00 ft higher. October 1,
1915, to May 30, 1923, non-recording gage, May 31, 1923, to September
30, 1927, water-stage recorder, and October 1, 1927, to August 8,
1934, non-recording gage, all at same site and datum.
WATER-QUALITY RECORDS
PERIOD OF RECORD.--Water years 1974-1979, 1987-1994.
PERIOD OF DAILY RECORD.--
NITRATE + NITRITE: March to September 2012.
WATER TEMPERATURE: March to September 2012.
National Weather Service River
Forecast
Advanced
Hydrologic Prediction Service
