UPDATE, 11/9: As of November 8, the USGS has successfully restored all of the operational gages that stopped transmitting due to an issue with the satellite telemetry system that records and transmits data. The USGS will now focus on restoring other equipment that experienced the telemetry issues, including about 85 rapid deployment gages that are used periodically for emergency response. Read more
LOCATION.--Lat 42°32'05.6", long 96°24'37.5"
referenced to North American Datum of 1927, in SE 1/4 SE 1/4 SE 1/4
sec.8, T.89 N., R.47 W., Woodbury County, IA, Hydrologic Unit
10230001, on left bank on downstream side of bridge on 38th Street in
Sioux City, 1.9 mi downstream from West Branch, and 4.2 mi upstream
from mouth. (map)
DRAINAGE AREA.--65.1 mi2.
PERIOD OF RECORD.--Discharge records from October 1945 to
September 1969, June 1981 to September 2004; stage-only records from
October 2004 to current year.
REVISED RECORDS.--WSP 1440: Drainage area. WDR IA-95-1: River
GAGE.--Water-stage recorder. Datum of gage is 1,112.04 ft above
National Geodetic Vertical Datum of 1929 (Sioux City benchmark).
Prior to May 20, 1954, non-recording gage with supplementary
water-stage recorder in operation above 5.0 ft gage height, and May
20, 1954, to September 30, 1969, water-stage recorder, both at datum
5.0 ft higher.