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USGS Water-Year Summary 2024
08405200 PECOS RIVER BELOW DARK CANYON DRAW, AT CARLSBAD, NM
LOCATION - Lat 32°24'33.39", long 104°12'53.90" referenced to North American Datum of 1983, Eddy County, NM, Hydrologic Unit 13060011, on left bank 700 ft downstream from mouth of Dark Canyon Draw, 0.3 mi downstream from Lower Tansill Dam and Bataan recreational area, 0.8 mi downstream from bridge on U.S. Highway 62-180 in Carlsbad, and at mile 459.1.
WATER QUALITY STATION: Lat 32°24'39.76", long 104°13'03.77" referenced to North American Datum of 1983, Eddy County, NM, Hydrologic Unit 13060011, on right bank 1,000 ft downstream of Lower Tansill dam and Bataan recreational area.
WATER QUALITY STATION: Lat 32°24'39.76", long 104°13'03.77" referenced to North American Datum of 1983, Eddy County, NM, Hydrologic Unit 13060011, on right bank 1,000 ft downstream of Lower Tansill dam and Bataan recreational area.
DRAINAGE AREA - 18,550 mi². (approximate contributing area)
REVISIONS HISTORY -
Peak Streamflow: Unit value discharge for 20:30 punch on 10/2/2023 was missing from the record and a qualifier of –unsp—was in its place. The value should have been 5,140 cfs but was blank. The record had been approved already as part of the 2023 compact records but the discharge.wy peak time series had not since it fell in the 2024 WY. The record was unapproved and the missing unit value filled itself in. This caused a slight change to the computed mean discharge for the date, going from 629 to 632 cfs. Revision qualifier was placed on the unit value time series along with a note. The revisions qualifier propagated to the daily value and an additional note was added.
Daily Values: Updated as described above.
SURFACE-WATER RECORDS
PERIOD OF RECORD - January 1970 to current year.
GAGE - Water-stage recorder with satellite telemetry, crest-stage gage and concrete control. Datum of gage is 3074.79 ft above NAVD88 as determined by a GNSS Level II rapid-static survey performed by the USGS on June 19, 2018.
REMARKS - Water years 2014-2024; records good except for estimated discharges, which are poor. Flow regulated by Lake Avalon (station 08403800) 8.1 mi upstream and by several other reservoirs
and up to Nov. 1982 at low stages by power plant. Power plant discontinued operation Nov. 1982. Diversions and ground-water withdrawals upstream
from station for irrigation of about 198,000 acres; supplemental ground-water withdrawals irrigate about 23,000 acres downstream, 1959
determination.
EXTREMES OUTSIDE PERIOD OF RECORD - The flood of Aug. 23, 1966, reached a stage of about 22 ft, discharge not determined. (For dates of other historical floods see station 08404000.)
