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USGS Water-Year Summary 2024
06861500 CEDAR BLUFF RESERVOIR NEAR ELLIS, KS
LOCATION - Lat 38°47'21", long 99°43'13" referenced to North American Datum of 1927, in NE 1/4 SW 1/4 sec.36, T.14 S., R.22 W., Trego County, KS, Hydrologic Unit 10260003, in control house structure of outlet works conduit at dam on Smoky Hill River, 18 mi southwest of Ellis, and at mile 333.7.
DRAINAGE AREA - 5,530 mi². approximately.
SURFACE-WATER RECORDS
PERIOD OF RECORD - November 1950 to current year. Monthly records only prior to August 1960.
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929 (levels by Bureau of Reclamation). Prior to Aug. 20, 1960, nonrecording mercury-column gage at same site and datum.
REMARKS - Reservoir is formed by compacted earthfill dam. Storage began Nov. 13, 1950. Dam was completed in 1951. Total capacity, 870,400 acre-ft, consisting of the following: Dead storage, 8,260 acre-ft below elevation 2,090 ft, sill of trashrack structure; irrigation pool, 176,800 acre-ft between elevations 2,090 ft and 2,144 ft; flood-control pool, 191,900 acre-ft between elevations 2,144 ft and 2,166 ft, crest of uncontrolled spillway and uncontrolled storage, 493,400 acre-ft between elevations 2,166 ft and 2,200 ft. Reservoir was used to store water for flood control, irrigation of 6,600 acres, and recreation. Reservoir is now used for flood control, municipal water supply, and recreation. Figures given herein represent total contents. Satellite telemeter at station.
EXTREMES FOR PERIOD OF RECORD - Maximum elevation, 2,154.90 ft, July 2, 1951, July 4, 5, 1957, contents, 269,400 acre-ft; minimum elevation since irrigation pool was first filled, 2,092.20 ft, Sept. 28, 1992, contents, 10,450 acre-ft.
