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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
06906190 LONG BRANCH RESERVOIR NEAR MACON, MO
LOCATION - Lat 39°45'12", long 92°31'05" referenced to North American Datum of 1983, in NW 1/4 sec.10, T.57 N., R.14 W., Macon County, MO, Hydrologic Unit 10280203, on reservoir control structure at right end of dam on East Fork Little Chariton River, 3.0 mi west of junction of U.S. Highways 63 and 36 in Macon, and 2.0 mi below confluence with Long Branch.
DRAINAGE AREA - 109 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - Sep 1978 to current year. Contents published 1982 to current year. Records collected at same site since 1978 are available from the U.S. Army Corps of Engineers.
GAGE - Water-stage recorder. Datum of gage is 0.07 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. Closure began on Sep 3, 1976. Storage began on Aug 2, 1978. An uncontrolled limited service type spillway, 50 ft wide, is located at the right abutment. Capacity of surcharge pool 98,590 acre-ft (elevation 801.1 ft to 820.7 ft); of flood control pool 30,600 acre-ft (elevation 791.1 ft to 801.0 ft); and of multipurpose pool 34,640 acre-ft (elevation 751.1 ft to 791.0 ft). Lake is used for flood control, water supply, water-quality control and recreation.
EXTREMES FOR PERIOD OF RECORD - Maximum contents, 84,200 acre-ft, May 30, 2019, elevation, 805.94 ft; minimum, 14,300 acre-ft, Dec 5, 1980, elevation, 780.21 ft.
