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Water-Year Summary for Site 06922440

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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Available Parameters
62614 Elevation, lake/res, NGVD29(Obs.)  

Water year 2023: 2023-10-01 to 2024-09-30

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USGS Water-Year Summary 2023
LOCATION - Lat 38°15'23.8", long 93°23'42.8" referenced to North American Datum of 1983, in NW 1/4 NE 1/4 sec.7, T.40 N., R.22 W., Benton County, MO, Hydrologic Unit 10290109, in control room near middle of dam on Osage River, 1.5 mi northwest of Warsaw, and at mile 175.
DRAINAGE AREA - 11,500 mi². with 7,856 mi² uncontrolled area below other reservoirs.
PERIOD OF RECORD - Oct 1981 to current year. Records collected at same site since 1977 available from U.S. Army Corps of Engineers.
GAGE - Water-stage recorder. Datum of gage is 0.45 ft above North American Vertical Datum of 1988 (U.S. Army Corps of Engineers).
REMARKS - Accuracy of records is discussed in the annual Station Analysis archived at the USGS MO Water Science Center.   Lake is formed by a rolled earthfill type dam. Storage began on Jul 21, 1977. Spillway is equipped with 4 tainter gates 40 ft wide by 47.3 ft high. Capacity of surcharge pool 2,911,000 acre-ft (elevation 739.6 ft to 751.1 ft); of flood control pool 4,006,000 acre-ft (elevation 706.0 ft to 739.6 ft); and of multipurpose pool 1,203,000 acre-ft (elevation 635.0 ft to 706.0). Lake is used for flood control, power, recreation, and fish and wildlife enhancement.
EXTREMES FOR PERIOD OF RECORD - Maximum contents, 5,210,000 acre-ft, Jun 3, 2019, elevation, 739.72 ft, Jun 3, 2019; minimum, 41,700 acre-ft, Nov 14, 1978, elevation, 661.0 ft.