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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.
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USGS Water-Year Summary 2024
14378200 ILLINOIS RIVER NEAR AGNESS, OR
LOCATION - Lat 42°32'41.56", long 124°03'06.89" referenced to North American Datum of 1983, in L 1/4 5 1/4 sec.18, T.35 S., R.11 W., Curry County, OR, Hydrologic Unit 17100311, on right bank, 0.7 mi downstream from Fox Creek, 1.0 mi southeast of Agness, and at mile 1.0.
DRAINAGE AREA - 988 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1960 to September 1981, September 2024 to current year.
GAGE - Water-stage recorder and crest-stage gage. Elevation of gage is 112 ft above NAVD of 1988, determined from digital elevation model. Prior to Sept. 26, 2024, at site 2.1 mi upstream at different datum.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 225,000 ft³/s Dec. 22, 1964, estimated on basis of runoff ratio with station near Selma; maximum gage height, 56.91 ft, site and datum then in use, from floodmark (backwater from Rogue River); minimum discharge, 125 ft³/s Sept. 14-16, 1977.
WATER-QUALITY RECORDS
PERIOD OF RECORD - WATER TEMPERATURE: September 2024 to current year.
INSTRUMENTATION - Temperature probe and data logger.
EXTREMES FOR PERIOD OF RECORD - WATER TEMPERATURE: Maximum, 19.6°C Sept. 27, 28, 2024; minimum, 15.6°C Sept. 30, 2024.
