USGS Water-Year Summary for Site 09147500

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	Available Parameters
	00010 Temperature, water(Max.,Min.)
	00045 Precipitation(Sum)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Mean)

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

09147500 UNCOMPAHGRE RIVER AT COLONA, CO

LOCATION - Lat 38°19'53.15", long 107°46'45.21" referenced to North American Datum of 1983, in NW 1/4 NW 1/4 sec.17, T.47 N., R.8 W., Ouray County, CO, Hydrologic Unit 14020006, on right bank 75 ft downstream from county highway crossing, 0.2 mi north of Colona, and 1.0 mi upstream from Beaton Creek.

DRAINAGE AREA - 448 mi².

REVISIONS HISTORY - WSP 1313: 1904. WDR CO-88-2: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - April 1903 to November 1905, April to June 1906 (gage heights and discharge measurements only), October 1912 to current year. Monthly discharge only for some periods, published in WSP 1313. Published as "near Colona" 1904-06, 1922-34. Statistical summary computed for 1986 to current year.

GAGE - Water-stage recorder with satellite telemetry and crest-stage gage. Elevation of gage is 6,320 ft above NGVD of 1929, from topographic map. See WSP 1713 or 1733 for history of changes prior to Sept. 30, 1949. Prior to July 10, 2013, at datum 3.00 ft higher.

REMARKS - Water year 2014; records good except for estimated daily discharges, which are poor. Water year 2015; records good except for estimated daily discharges, which are poor. Water year 2016; records good except for estimated daily discharges, which are poor. Water year 2017; records good except for estimated daily discharges, which are poor. Water year 2018; records good except for estimated daily discharges, which are poor. Water year 2019; records good except for estimated daily discharges, which are poor. Water year 2020; records good except for estimated daily discharges, which are poor. Water year 2021; records good except for estimated daily discharges, which are poor. Water year 2022; records good except for estimated daily discharges, which are poor. Water year 2023; records good except for estimated daily discharges, which are poor. Flow regulated by Ridgway Reservoir, 7.7 mi upstream, since 1986, total capacity, 84,590 acre-ft. Diversions upstream from station for irrigation of about 2,600 acres downstream from station.

CLIMATOLOGICAL RECORDS

PERIOD OF RECORD - April 2019 to current year (seasonal records only).

INSTRUMENTATION - Tipping-bucket rain gage with satellite telemetry. Elevation of gage is 6,320 ft above NGVD of 1929, from topographic map.

EXTREMES FOR PERIOD OF RECORD - (seasonal only) Maximum daily precipitation, 0.78 inches, Aug. 1, 2021.

REMARKS - Gage operated seasonally, April through September. Records are not rated, and periods of missing record are not estimated.