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USGS Water-Year Summary 2024
09125800 SILVER JACK RESERVOIR NEAR CIMARRON, CO
LOCATION - Lat 38°13'58", long 107°32'28" referenced to North American Datum of 1927, in T.46 N., R.6 W., Gunnison County, CO, Hydrologic Unit 14020002, in gate house of Silver Jack Dam on Cimarron River, 14.5 mi south of Cimarron.
DRAINAGE AREA - 59 mi².
REVISIONS HISTORY - WDR CO-92-2: 1991 minimum contents.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1987 to current year. For a complete listing of historical data available for this site, see https://waterdata.usgs.gov/nwis/inventory/?site_no=09125800&agency_cd=USGS.
GAGE - Water-stage recorder with satellite telemetry. Datum of gage is 8925.60 ft above NGVD of 1929 (levels by U.S. Bureau of Reclamation); gage readings have been reduced to elevations above NGVD of 1929.
COOPERATION - Capacity tables provided by U.S. Bureau of Reclamation.
REMARKS - Reservoir is formed by an earthfill dam. Storage began in December 1970; dam completed December 1971. Capacity, 13,520 acre-ft, 1971 survey, between elevation 8,800.0 ft, streambed at dam, and 8,925.6 ft, crest of spillway. Dead storage below elevation 8,836.0 ft, 520 acre-ft. Figures given are live contents.
EXTREMES FOR PERIOD OF RECORD - Maximum contents, 13,350 acre-ft, June 30, 2019, elevation, 8,926.76 ft; minimum contents, 564.8 acre-ft, Oct. 16, 2020, elevation, 8848.08 ft.
CLIMATOLOGICAL RECORDS
PERIOD OF RECORD - October 2017 to current year (seasonal records only).
INSTRUMENTATION - Tipping-bucket rain gage with satellite telemetry. Datum of gage is 8925.60 ft above NGVD of 1929 (levels by U.S. Bureau of Reclamation).
EXTREMES FOR PERIOD OF RECORD - (seasonal only) Maximum daily precipitation, 0.95 inches, Aug. 1, 2021.
REMARKS - Gage operated seasonally, April through September. Unless otherwise noted, records are not rated, and periods of missing record are not estimated.
