07109500 ARKANSAS RIVER NEAR AVONDALE, CO
LOCATION.--Lat 38°14'53", long 104°23'55", in NE14SW14 sec.1, T.21 S., R.63 W., Pueblo County, Hydrologic Unit 11020002, on right bank 15 ft downstream from bridge on Nyberg Road (revised), 0.3 mi upstream from Sixmile Creek, and 2.6 mi west of Avondale.
DRAINAGE AREA.--6,327 mi2.
PERIOD OF RECORD.--May 1939 to September 1951, February 1965 to current year. Statistical summary computed for 1975 to current year, subsequent to partial regulation by Pueblo Reservoir. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=07109500
REVISED RECORDS.--WSP 1087: 1942. WSP 1311: Drainage area.
GAGE.--Water-stage recorder with satellite telemetry. Datum of gage is 4,509.53 ft above NGVD of 1929. Prior to Feb. 1, 1965, at site 550 ft downstream at datum 0.37 ft lower. Feb. 1, 1965 to Sept. 30, 1991, at datum 1.00 ft higher.
REMARKS.--Records good except for estimated daily discharges, which are fair. Natural flow of stream affected by transbasin and transmountain diversions, storage reservoirs, power development, ground-water withdrawals, diversions for irrigation and municipal use, return flows from irrigated areas, and flows from sewage-treatment plants. Flow partly regulated by Pueblo Reservoir (station 07099350) 21 mi upstream since Jan. 9, 1974.
a Average discharge for 20 years (water years 1940-51, 1966-73), 867 ft3/s; 628,100 acre-ft/yr, prior to completion of Pueblo Dam.
c From rating curve extended above 11,500 ft3/s on basis of velocity-area study. Maximum discharge and stage for period of record, about 50,000 ft3/s,
June 18, 1965, gage height, 9.77 ft, datum then in use, from rating curve extended above 6,700 ft3/s, on basis of records for station near Pueblo and indirect measurements of peak flow on Fountain Creek at Pueblo, Chico Creek near North Avondale, and Arkansas River near Avondale.