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Water-Year Summary for Site 09486350

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
  • For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
  • For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
  • For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
  • Not all sites have reports available for every water year.
Available Parameters
00060 Discharge(Mean)  

Water year 2023: 2023-10-01 to 2024-09-30

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USGS Water-Year Summary 2023
LOCATION - Lat 32°20'10", long 111°02'29" referenced to North American Datum of 1927, in NW 1/4 NE 1/4 NW 1/4 sec.05, T.13 S., R.13 E., Pima County, AZ, Hydrologic Unit 15050301, on left bank, 0.125 mi downstream from Ina Road, 0.25 mi upstream from Thornydale Rd., 1.5 mi upstream from mouth, and 7.3 mi north of Tucson.
DRAINAGE AREA - 255 mi².
PERIOD OF RECORD - May 1990 to Sept. 1995 (discharge above 200 ft³/s only), Oct. 1995 to current year.
GAGE - Water-stage recorder and crest-stage gages. Elevation of gage is 2,240 ft above sea level, from topographic map.
REMARKS - Records good except for estimated discharge which is poor. Lago del Oro Reservoir capacity, 9,400 acre-ft, 19.6 mi upstream, has contained no storage since May 4, 1971.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 9,870 ft³/s, Sept. 8, 2014, gage height, 11.96 ft (from floodmark); minimum, no flow for most days each year.