USGS Water-Year Summary for Site 09346400

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	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

09346400 SAN JUAN RIVER NEAR CARRACAS, CO

LOCATION - Lat 37°00'49", long 107°18'42" referenced to North American Datum of 1927, in SE 1/4 SW 1/4 sec.17, T.32 N., R.4 W., Archuleta County, CO, Hydrologic Unit 14080101, on right bank five feet above the maximum water surface of Navajo Reservoir, 3 mi. northwest of Carracas, and 7.2 mi. upstream from Piedra River.

DRAINAGE AREA - 1,250 mi².

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

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1961 to current year. Statistical summary computed for 1971 to current year, subsequent to completion of Azotea Tunnel.

GAGE - Water-stage recorder with satellite telemetry and crest-stage gage. Elevation of gage is 6,090 ft above NGVD of 1929, from river-profile map.

REMARKS - Water year 2014; records fair 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 fair except for estimated daily discharges, which are poor. Water year 2018; records fair except for estimated daily discharges, which are poor. Water year 2019; records fair 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 flows above 440 ft³/s, which are fair, and estimated daily discharges, which are poor. Diversions for irrigation of about 11,000 acres upstream from station. Highwater diversions upstream from station into Rio Grande Basin through Azotea Tunnel (station 08284160) began in March 1971.

EXTREMES OUTSIDE PERIOD OF RECORD - Major floods occurred Sept. 5 or 6, 1909; Oct. 5, 1911; June 29, 1927.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 9,730 ft³/s, Sept. 6, 1970, from rating curve extended above 6,000 ft³/s, on basis of slope-area measurement of peak flow, gage height, 8.34 ft.