USGS Water-Year Summary 2021
14377100 ILLINOIS RIVER NEAR KERBY, OR
LOCATION - Lat 42°13'55", long 123°39'45" referenced to North American Datum of 1927, in SE 1/4 SE 1/4 sec.29, T.38 S., R.8 W., Josephine County, OR, Hydrologic Unit 17100311, Siskiyou National Forest, on right bank, 1.6 mi upstream from Josephine Creek, 2.5 mi northwest of Kerby and at mile 50.3.
DRAINAGE AREA - 380 mi².
PERIOD OF RECORD - October 1961 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 1,198.80 ft above NGVD of 1929. Prior to Jan. 28, 1965, water-stage recorder and Jan. 28 to Sept. 30, 1965, nonrecording gage 700 ft downstream at datum 2.99 ft lower.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 92,200 ft³/s Dec. 22, 1964, gage height, 45.28 ft, from floodmark, site and datum then in use, from rating curve extended above 30,000 ft³/s on basis of slope-area measurement of peak flow; minimum discharge, 11 ft³/s Sept. 4, 2014.