USGS Water-Year Summary for Site 09169500

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	Available Parameters
	00010 Temperature, water(Max.,Min.)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Mean)
	70302 Dissolved solids(Mean) [Computed TDS tons/day]
	99401 Diss solids, estim(Mean) [Computed TDS mg/L]

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

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USGS Water-Year Summary 2023

09169500 DOLORES RIVER AT BEDROCK, CO

LOCATION - Lat 38°18'37", long 108°53'05" referenced to North American Datum of 1927, in NW 1/4 SW 1/4 sec.20, T.47 N., R.18 W., Montrose County, CO, Hydrologic Unit 14030002, on right bank at upstream side of bridge, 0.4 mi southeast of Bedrock, and 3.1 mi upstream from East Paradox Creek.

DRAINAGE AREA - 2,025 mi².

REVISIONS HISTORY - WDR-US-2011: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1917 to September 1922 (monthly discharge only for some periods, published in WSP 1313), August 1971 to current year. Statistical summary computed for 1985 to current year, subsequent to regulation by McPhee Reservoir.

GAGE - Water-stage recorder with satellite telemetry and crest-stage gage. Elevation of gage is 4,940 ft above NGVD of 1929, from topographic map. Prior to Aug. 1, 1971, nonrecording gage at different datum. Since Aug. 2, 2016, the gage is located with the monitor, along the right bank, approximately 275 ft upstream of Hwy 90, during the 2016-17 bridge reconstruction.

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 flows above 400 ft³/s, and 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 flows below 4 ft³/s, and 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. Diversions upstream from station for irrigation of about 5,000 acres upstream from station, and about 74,760 acres in the San Juan River Basin. Flow regulated since Mar. 19, 1984, by McPhee Reservoir, capacity 381,000 acre-ft.

EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Sept. 6, 1970, reached a stage of 7.15 ft, present datum, from floodmarks (discharge not determined).