USGS Water-Year Summary for Site 07124000

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	Available Parameters
	00010 Temperature, water(Max.,Min.)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Mean,Max.,Min.)

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Water year 2024: 2024-10-01 to 2025-09-30

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USGS Water-Year Summary 2024

07124000 ARKANSAS RIVER AT LAS ANIMAS, CO

LOCATION - Lat 38°04'51", long 103°13'09" referenced to North American Datum of 1927, in SE 1/4 NE 1/4 sec.03, T.23 S., R.52 W., Bent County, CO, Hydrologic Unit 11020009, in middle on downstream side of bridge on U.S. Highway 50, 1.1 mi north of courthouse in Las Animas, and 4.2 mi upstream from Purgatoire River.

DRAINAGE AREA - 14,245 mi² of which 441 mi² probably is noncontributing.

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

SURFACE-WATER RECORDS

PERIOD OF RECORD - May to November 1898 (gage heights only), August to November 1909 (gage heights and discharge measurements only), May 1939 to current year. Statistical summary computed for 1975 to current year, subsequent to partial regulation by Pueblo Reservoir.

GAGE - Water-stage recorder with satellite telemetry and crest-stage gage. Datum of gage is 3,883.97 ft above NGVD of 1929. May 13 to Nov. 12, 1898, and Aug. 1 to Nov. 10, 1909, nonrecording gages near present site at different datums. May 23, 1939 to Apr. 27, 1967, water-stage recorder at site 0.4 mi downstream at datum 9.00 ft lower. Prior to June 21, 2001, gage located on right bank at upstream side of bridge at same datum.

REMARKS - Water year 2014; records good except for estimated daily discharges, which are poor. Water year 2015; records fair except for estimated daily discharges, which are poor. Water year 2016; records fair except for estimated daily discharges, which are poor. Water year 2017; records fair except for flows above 3,000 ft³/s, and 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 flows above 530 ft³/s, and estimated daily discharges, which are poor. Water year 2020; no estimated daily discharges. Records fair except for flows above 530 ft³/s, which are poor. Water year 2021; records fair except for flows above 530 ft³/s, and estimated daily discharges, which are poor. Water year 2022; records fair except for flows above 710 ft³/s, and estimated daily discharges, which are poor. Water year 2023; records fair except for flows above 634 ft³/s, and estimated daily discharges, which are poor. Natural flow of stream affected by storage reservoirs, power developments, transbasin and transmountain diversions, diversions for irrigation and municipal use, groundwater withdrawals, return flows from irrigated areas, and flows from sewage-treatment plants. Flow partly regulated by Pueblo Reservoir (station 07099350) about 104 mi upstream since Jan. 9, 1974.

EXTREMES FOR PERIOD PRIOR TO REGULATION - Maximum discharge, 44,000 ft³/s, May 20, 1955, from current-meter measurement and slope-area measurement of overflow channel, gage height, 15.03 ft, site and datum then in use.