USGS Water-Year Summary for Site 08251500

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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

08251500 RIO GRANDE NEAR LOBATOS, CO

LOCATION - Lat 37°04'43", long 105°45'25" referenced to North American Datum of 1983, in NE 1/4 NW 1/4 sec.27, T.33 N., R.11 E., Conejos County, CO, Hydrologic Unit 13010002, on right bank at highway bridge, 5.7 mi north of Colorado-New Mexico State line, 8 mi downstream from Culebra Creek, 11 mi east of Lobatos, and 14 mi east of Antonito.

DRAINAGE AREA - 7,700 mi² of which 2,940 mi² probably is noncontributing. in closed basin in northern part of San Luis Valley, CO. Total area is approximate.

REVISIONS HISTORY - WSP 210: Drainage area. WSP 1312: 1919 (monthly discharge and runoff). WDR CO-78-1: 1976.

SURFACE-WATER RECORDS

PERIOD OF RECORD - July 1899 to current year. Monthly discharge only for some periods, published in WSP 1312. Published as "at Cenicero" 1899-1901, and as "near Cenicero" 1902-4. Statistical summary computed for 1931 to current year.

GAGE - Water-stage recorder with satellite telemetry. Datum of gage is 7,427.63 ft above NGVD of 1929. Prior to Nov. 8, 1910, nonrecording gages at same site and datum.

COOPERATION - Records collected and computed by Colorado Division of Water Resources and reviewed by Geological Survey.

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 the period July 1 to Sept. 30, which is fair, and estimated daily discharges, which are poor. Water year 2019; records good except for flows below 20 ft³/s, which is fair, and estimated daily discharges, which are poor. Water year 2020; records good except for flows below 20 ft³/s, which are fair, and estimated daily discharges, which are poor. Water year 2021; records good except for flows below 20 ft³/s, which are fair, 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. Natural flow of stream affected by storage reservoirs, transmountain diversions, diversions for irrigation and municipal use, groundwater withdrawals, return flows from irrigated areas, and flows from sewage-treatment plants.

EXTREMES OUTSIDE PERIOD OF RECORD - Maximum stage of June 18, 1903, is greatest since at least 1828.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 11,600 ft³/s, May 8, 1952, from rating curve extended above 8,000 ft³/s, gage height, 8.76 ft.