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Notice - The USGS Water Resources Mission Area's priority is to maintain the safety and well-being of our communities, including providing critical situational awareness in times of f
looding in all 50 U.S. states and additional territories. Our hydrologic monitoring stations continue to send data in near real-time to NWISWeb, and we are continuing critical water monitori
ng activities to protect life and property on a case-by-case basis. The health and safety of the public and our employees are our highest priorities, and we continue to follow guidance from
the White House, the CDC, and state and local authorities.
LOCATION.--Lat 43°28'11", long 95°07'25"
referenced to North American Datum of 1927, in NE 1/4 SE 1/4 NW 1/4
sec.20, T.100 N., R.36 W., Dickinson County, IA, Hydrologic Unit
10230003, 2.3 mi upstream from lake outlet, and 2.3 mi northwest of
DRAINAGE AREA.--75.6 mi2.
PERIOD OF RECORD.--Stage-only records from May 1933 to September
1975 (fragmentary), April 1990 to current year. Prior to October
1949, published as "at Orleans".
GAGE.--Water-stage recorder. Datum of gage is 1,387.25 ft above
National Geodetic Vertical Datum of 1929, 90.00 ft above Iowa Lake
Survey datum, and 14.15 ft below crest of spillway. Prior to July 6,
1950, non-recording gage or water-stage recorder at various sites
near outlet, all at same datum.
REMARKS.--Lake formed by concrete dam with ungated spillway at
elevation 1,401.4 ft above National Geodetic Vertical Datum of 1929.
Dam constructed in 1969. A previous outlet works had been constructed
in 1944. Lake is used for conservation and recreation.
PERIOD OF DAILY RECORD.--
WATER TEMPERATURE: Daily minimum/maximum, November 1968 to September
1975, records fragmentary. Daily mean, October 2011 to current year,