07123000 ARKANSAS RIVER AT LA JUNTA, CO
LOCATION.--Lat 37°59'26", long 103°31'55", in SE14NE14 sec.2, T.24 S., R.55 W., Otero County, Hydrologic Unit 11020005, on right bank at upstream side of bridge on State Highway 109 in La Junta, and 450 ft upstream from King Arroyo.
DRAINAGE AREA.--12,210 mi2, of which 115 mi2 is probably noncontributing.
PERIOD OF RECORD.--May to August 1889 and September 1893 to December 1895 (gage heights, discharge measurements, and flood data only), April to October 1903 and June to November 1908 (gage heights and discharge measurements only), April 1912 to current year. Monthly discharge only for some periods, published in WSP 1311. Published as "near La Junta" in 1903. Statistical summary computed for 1975 to current year subsequent to completion of Pueblo Dam. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=07123000
REVISED RECORDS.--WSP 1341: Drainage area. WSP 1731: 1922.
GAGE.--Water-stage recorder with satellite telemetry. Datum of gage is 4,039.60 ft above NGVD of 1929. See WSP 1711 or 1731 for history of changes prior to June 13, 1940. June 13, 1940 to June 6, 1967, water-stage recorder at site 300 ft upstream at present datum.
REMARKS.--Records good except for 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, ground-water withdrawals, return flows from irrigated areas, and flows from sewage-treatment plants. Flow partly regulated by Pueblo Reservoir (station 07099350) about 82 mi upstream since Jan. 9, 1974.
COOPERATION.--Records collected and computed by Colorado Division of Water Resources and reviewed by Geological Survey.
a Average discharge for 61 years (water years 1913-73), 244 ft3/s; 176,800 acre-ft/yr, prior to completion of Pueblo Dam.
c Also occurred Dec 9, 1978; minimum daily discharge for period of record, no flow, Jan 20-23 and Mar 20-23, 1915.
d Peak discharge includes 7,600 ft3/s (estimated) that bypassed the main channel; maximum discharge for period of record, 200,000 ft3/s, Jun 4, 1921, from rating curve extended above 15,000 ft3/s on basis of slope-area measurement of peak flow.