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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
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USGS Water-Year Summary 2024
06821140 SMITHVILLE RESERVOIR NEAR SMITHVILLE, MO
LOCATION - Lat 39°23'50", long 94°33'25" referenced to North American Datum of 1927, in NE 1/4 NE 1/4 NW 1/4 sec.24, T.53 N., R.33 W., Clay County, MO, Hydrologic Unit 10240012, in control tower at outlet works on the Little Platte River, 1.0 mi northeast of Smithville, and 5.0 mi north of Kansas City.
DRAINAGE AREA - 213 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - Jul 1981 to current year. Records collected at same site since 1976 are available from the U.S. Army Corps of Engineers.
GAGE - Water-stage recorder. Datum of gage is 0.31 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 13, 1976. An uncontrolled limited service type spillway, 50 ft wide, is located at the right abutment. Capacity of surcharge pool 182,209 acre-ft (elevation 876.2 ft to 891.1 ft); of flood control pool 101,800 acre-ft (elevation 864.2 to 876.2 ft); and of multipurpose pool 144,600 acre-ft (elevation 799.0 ft to 864.2 ft). Lake is used for flood control, water supply, water-quality control, recreation, and fish and wildlife enhancement.
EXTREMES FOR PERIOD OF RECORD - Maximum contents, 230,000 acre-ft, Jun 08, 2015, maximum elevation 874.80 ft; minimum, 2,360 acre-ft, Jan 13, 1980, elevation, 819.0 ft.
