USGS Water-Year Summary 2021
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.
- WSP 210: Drainage area. WSP 1312: 1919 (monthly discharge and runoff). WDR CO-78-1: 1976.
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.
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.