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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.
USGS Water-Year Summary 2024
05440700 ROCK RIVER AT BYRON, IL
LOCATION - Lat 42°07'19.88", long 89°15'19.31" referenced to North American Datum of 1983, in NW 1/4 SW 1/4 sec.32, T.25 N., R.11 E., Ogle County, IL, Hydrologic Unit 07090005, at bridge on State Highway 72, 0.3 mi south of Byron, 1.2 mi upstream from Mill Creek, 1.3 mi downstream from Stillman Creek, and at mile 120.3.
DRAINAGE AREA - 7,990 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD -
SURFACE-WATER DISCHARGE AND STAGE
DISCHARGE: May 2000 to current.
STAGE: Water years 2000 to current.
PRECIPITATION: May 2000 to April 2014.
SURFACE-WATER QUALITY
CHEMICAL: Water years 1978-1988 and 2009-2011.
Additional data for water years 1964, 1971-1977 are published in
Water-Resources Investigations 78-23 and 79-24 as site P 14.
WATER TEMPERATURE: July 2012 to current.
SURFACE-WATER DISCHARGE AND STAGE
DISCHARGE: May 2000 to current.
STAGE: Water years 2000 to current.
PRECIPITATION: May 2000 to April 2014.
SURFACE-WATER QUALITY
CHEMICAL: Water years 1978-1988 and 2009-2011.
Additional data for water years 1964, 1971-1977 are published in
Water-Resources Investigations 78-23 and 79-24 as site P 14.
WATER TEMPERATURE: July 2012 to current.
GAGE - Water-stage recorder, water-temperature sensor, and satellite telemeter. Datum of gage is 666.00 ft NAVD 1988.
REMARKS - Collection, computation, and publication of precipitation data do not necessarily conform to standards used by the National Weather Service. Precipitation data could be subject to error for days with freezing and/or thawing of precipitation, which are identified as estimated (e).
Accuracy of records is discussed in the annual Station Analysis archived at the USGS IL Water Science Center.
EXTREMES FOR PERIOD OF RECORD - SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 40,100 ft³/s, April 20, 2013, gage-height, 17.08 ft; minimum discharge, 1,190 ft³/s, Sept. 9, 2003 and Nov. 3, 2005.
PRECIPITATION: Maximum daily total, 5.57 in., July 23, 2010.
WATER TEMPERATURE: Maximum, 32.6 oC, July 07, 2012; minimum, -0.9 oC, Dec. 12-15, 2013
PRECIPITATION: Maximum daily total, 5.57 in., July 23, 2010.
WATER TEMPERATURE: Maximum, 32.6 oC, July 07, 2012; minimum, -0.9 oC, Dec. 12-15, 2013
