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Water-Year Summary for Site 07109500

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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Available Parameters
00010 Temperature, water(Max.,Min.,Mean)  
00060 Discharge(Mean)  
00095 Specific cond at 25C(Mean)  
00300 Dissolved oxygen(Max.,Min.,Mean)  
00400 pH(Max.,Min.,Med.)  

Water year 2020: 2020-10-01 to 2021-09-30
 

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USGS Water-Year Summary 2020
07109500 ARKANSAS RIVER NEAR AVONDALE, CO
LOCATION - Lat 38°14'53", long 104°23'55" referenced to North American Datum of 1927, in NE 1/4 SW 1/4 sec.01, T.21 S., R.63 W., Pueblo County, CO, Hydrologic Unit 11020002, near center of span on downstream side of Nyberg Road bridge, 0.3 mi upstream from Sixmile Creek, and 2.6 mi west of Avondale.
DRAINAGE AREA - 6,254 mi².
REVISIONS HISTORY - WSP 1087: 1942. WDR-US-2011: Drainage area.
SURFACE-WATER RECORDS
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.
GAGE - Water-stage recorder with satellite telemetry and crest-stage gage. Datum of gage is 4,509.53 ft above NGVD of 1929. Prior to Feb. 1, 1965, at site 550 ft downstream on right bank at datum 0.37 ft lower. Feb. 1, 1965 to Sept. 30, 1991, at site on right bank at datum 1.00 ft higher. Oct. 1, 1991 to Nov. 17, 2004, at site on right bank at same datum. Nov. 18, 2004 to Mar. 1, 2007, at site 115 ft upstream on left bank at same datum.
REMARKS - Water year 2014; no estimated daily discharges. Records good. Water year 2015; records good except for estimated daily discharges, which are poor. Water year 2016; records good except for estimated daily discharges, which are poor. Water year 2017; no estimated daily discharges. Records good. Water year 2018; records good except for estimated daily discharges, which are poor. Water year 2019; records fair except for estimated daily discharges, which are poor. Natural flow of stream affected by transbasin and transmountain diversions, storage reservoirs, power development, groundwater 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.
EXTREMES FOR PERIOD OF RECORD -

Maximum discharge, 20,900 ft³/s, Apr. 30, 1999, from rating curve extended above 11,500 ft³/s on basis of velocity-area study, gage height, 10.60 ft, from floodmark.