USGS Water-Year Summary 2021
14361500 ROGUE RIVER AT GRANTS PASS, OR
LOCATION - Lat 42°25'50", long 123°19'00" referenced to North American Datum of 1927, in NW 1/4 sec.20, T.36 S., R.5 W., Josephine County, OR, Hydrologic Unit 17100308, on right bank, 0.6 mi upstream from 6th Street bridge/Caveman bridge on State Highway 99S at Grants Pass and at mile 101.8.
DRAINAGE AREA - 2,459 mi².
- WSP 1738: Drainage area.
PERIOD OF RECORD - October 1938 to current year. Prior to January 1939, monthly discharge only, published in WSP 1318.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 884.28 ft above NGVD of 1929. Prior to Aug. 8, 1957, at site 300 ft upstream at datum 4.00 ft higher and Aug. 8, 1957 to Sept. 2, 1983, at site 300 ft upstream at datum 1.00 ft higher.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of December 1861 reached a stage of about 43 ft, present datum (information furnished by U.S. Army Corps of Engineers). Flood of February 1890 reached a stage of about 36 ft, present datum and that of Feb. 21, 1927, about 32 ft, present datum, according to local resident.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 152,000 ft³/s Dec. 23, 1964, gage height, 35.15 ft, present datum, from rating curve extended above 93,000 ft³/s; minimum discharge, 195 ft³/s Jan. 30, 1961; minimum daily, 606 ft³/s Sept. 10, 1968.
PERIOD OF DAILY RECORD - WATER TEMPERATURE: August 2007 to current year.
INSTRUMENTATION - Temperature probe and data logger.
EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Maximum, 23.1°C July 29, 30, 2014; minimum, 0.3°C Dec. 9, 2013.