USGS Water-Year Summary for Site 09166500

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	Available Parameters
	00045 Precipitation(Sum)
	00060 Discharge(Mean)

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

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USGS Water-Year Summary 2023

09166500 DOLORES RIVER AT DOLORES, CO

LOCATION - Lat 37°28'21", long 108°29'49" referenced to North American Datum of 1927, in SW 1/4 SW 1/4 sec.10, T.37 N., R.15 W., Montezuma County, CO, Hydrologic Unit 14030002, on left bank 0.30 mi. upstream from bridge on State Highway 184 in Dolores, and 0.8 mi. upstream from Lost Canyon Creek.

DRAINAGE AREA - 504 mi².

REVISIONS HISTORY - WSP 859: 1937. WRD Colo. 1972: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - June 1895 to October 1903, August 1910 to November 1912, October 1921 to current year. Monthly discharge only for some periods, published in WSP 1313.

GAGE - Water-stage recorder with satellite telemetry and crest-stage gage. Elevation of gage is 6,940 ft above NGVD of 1929, from topographic map. See WSP 1713 or 1733 for history of changes prior to Oct. 7, 1952. Oct. 7, 1952 to Nov. 16, 1983, at site 0.4 mi downstream at different datum.

REMARKS - Water year 2014; records good except for estimated daily discharges, which are poor. Water year 2015; records good except for the period May 1 to Aug. 20, and 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 fair except for estimated daily discharges, which are poor. Diversions for irrigation of about 2,000 acres upstream from station. Flow partly regulated by Ground Hog Reservoir, capacity 21,710 acre-ft.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 10,000 ft³/s, Oct. 5, 1911, from rating curve extended above 2,800 ft³/s, gage height, 10.20 ft, site and datum then in use.

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 6,940 ft above NGVD of 1929, from topographic map.

EXTREMES FOR PERIOD OF RECORD - (seasonal only) Maximum daily precipitation, 1.04 inches, May 13, 2023.

REMARKS - Gage operated seasonally, April through September. Unless otherwise noted, records are not rated, and periods of missing record are not estimated.