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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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USGS Water-Year Summary 2024
09147022 RIDGWAY RESERVOIR NEAR RIDGWAY, CO
LOCATION - Lat 38°14'14", long 107°45'27" referenced to North American Datum of 1927, in NW 1/4 SW 1/4 sec.16, T.46 N., R.8 W., Ouray County, CO, Hydrologic Unit 14020006, in concrete gate house at base of Ridgway Reservoir on Uncompahgre River, 0.5 mi upstream from Fisher Creek, and 5.3 mi north of Ridgway.
DRAINAGE AREA - 265 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1988 to September 1993. September 2007, September 2009 (Monthend storage only). October 2005 to September 2006, October 2008 to current year.
GAGE - Water-stage recorder with satellite telemetry. Datum of gage is 6,871.13 ft (revised) above NGVD of 1929, (levels by U.S. Bureau of Reclamation).
COOPERATION - Capacity tables provided by U.S. Bureau of Reclamation.
REMARKS - Reservoir is formed by an earthfill dam. Dam completed Mar. 22, 1988. Capacity 84,590 acre-ft, between 6,680.0 ft, streambed at dam axis and 6,871.13 ft (revised), crest of spillway. Dead storage below elevation 6,720.0 ft, 1,430 acre-ft. Figures given are live contents.
EXTREMES FOR PERIOD OF RECORD - Maximum contents 84,900 acre-ft, June 11, 1990, elevation 6,872.93 ft; minimum contents, 43,440 acre-ft, Sept. 30, 2018, elevation, 6,826.49 ft.
