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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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USGS Water-Year Summary 2024
08402000 PECOS RIVER AT DAMSITE 3, NEAR CARLSBAD, NM
LOCATION - Lat 32°30'40.42", long 104°19'59.84" referenced to North American Datum of 1983, Eddy County, NM, Hydrologic Unit 13060011, on right bank at damsite 3 of Carlsbad Project of Bureau of Reclamation, about 1 mi upstream from flow line of Lake Avalon, 1.3 mi downstream from Rocky Arroyo, 8.0 mi northwest of Carlsbad, and at mile 473.8.
DRAINAGE AREA - 17,980 mi². (approximate contributing area)
REVISIONS HISTORY - WSP 1512: 1946-47(M), 1948(P), 1949, 1950(P). WSP 1712: drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - August 1939 to December 1940, August 1944 to current year.
GAGE - Water-stage recorder with satellite telemetry and crest-stage gage. Datum of gage is 3172.83 ft above NAVD88 as determined by a GNSS Level II rapid-static survey performed by the USGS on June 17, 2020. Prior to Aug. 10, 1944, at site 1,000 ft downstream at datum 1.00 ft higher. Aug. 10, 1944, to Dec. 31, 1966, at present datum 1.00 ft higher.
REMARKS - Water years 2014-2023; records good except for estimated discharges, which are poor. Flow regulated by Brantley Lake (station 08401450), 4.8 mi upstream, and other reservoirs and diversion dams. Diversions and ground-water withdrawals for irrigation of about 17,300 acres, 1959 determination, upstream from station. Discharge represents inflow to Lake Avalon.
EXTREMES OUTSIDE PERIOD OF RECORD - Peaks that probably exceeded 40,000 ft³/s occurred in Aug. 1893, Oct. 2, 1904, July 25, 1905, Apr. 17, 1915, Aug. 7, 1916, and May 30, 1937, based primarily on records for station "at Carlsbad." Peak of May 22, 1941, was estimated at 60,000 ft³/s. Floods of 1893 and 1904 originated upstream from McMillan Dam and contributed to the two failures of Avalon Dam.
