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Water-Year Summary for Site 09485000

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

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USGS Water-Year Summary 2021
LOCATION - Lat 32°07'46", long 110°37'31" referenced to North American Datum of 1927, in NW 1/4 NE 1/4 sec.17, T.15 S., R.17 E., Pima County, AZ, Hydrologic Unit 15050302, on left bank 0.2 mi north of Sentinel Butte, 9 mi upstream from mouth, and 22 mi southeast of Tucson City Hall.
DRAINAGE AREA - 44.8 mi².
PERIOD OF RECORD - Oct. 1952 to Sept. 1974, Oct. 1974 to Sept. 1989 (crest-stage partial-record station), Oct. 1989 to current year.
GAGE - Water-stage recorder and concrete control. Elevation of gage is 3,120 ft above sea level, from topographic map. Oct. 1952 to Sept. 1974 (water-stage recorder) and Oct. 1974 to Sept. 1989 (crest-stage gage) at same site and datum.
REMARKS - Records fair except for estimated discharge and discharge above 300 ft³/s, which are poor.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 15,000 ft³/s, July 31, 2006, gage height, 12.7 ft, from floodmark, on basis of slope-area measurement of peak flow. Minimum daily discharge, no flow for many days in each year.