USGS Water-Year Summary 2023
07026040 OBION RIVER AT U.S. HIGHWAY 51 NEAR OBION, TN
LOCATION - Lat 36°14'26.74", long 89°13'03.27" referenced to North American Datum of 1927, Obion County, TN, Hydrologic Unit 08010202, on right downstream bank, at end of main channel bridge on U.S. Highway 51, 3.2 mi northeast of Trimble, 2.0 mi southwest of Obion and 1.6 river miles downstream of the former gage location, Obion River at Obion.
DRAINAGE AREA - 1,875 mi².
REVISIONS HISTORY - WSP 1211: 1930, 1943. WSP 2120: Drainage area. On June 18, 2013, the maximum discharge for Water Year 2011 was revised and is documented in the report for 2012 http://wdr.water.usgs.gov/wy2012/pdfs/07026040.2012.pdf
SURFACE-WATER RECORDS
PERIOD OF RECORD - July 1929 to September 1958, October 1966 to September 1995, October 2001 to current year. Gage height and discharge records at this site from 1964 to 1975 are in reports of U.S. Army Corps of Engineers. Prior to Oct. 1990 published as "at Obion" (07026000).
GAGE - Data collection platform. Datum of gage is 245.26 (NAVD 88). Prior to Oct. 1990 water-stage recorder at site 1.6 mi upstream at a datum 1.31 ft higher (levels by the U.S. Army Corps of Engineers). Prior to Oct. 1, 1932, nonrecording gage at site 1.6 mi upstream at datum 6.31 ft higher; Oct. 1, 1932 to Aug. 2, 1939, nonrecording gage, and Aug. 3, 1939, to Sept. 1958, water-state recorder at site 1.6 mi upstream at datum 16.31 ft higher.
COOPERATION - Gage operated jointly with the U.S. Army Corps of Engineers, Memphis District.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 99,500 ft³/s, Jan. 24, 1937 gage height, 40.4 ft present datum; minimum under conditions of no backwater, 230 ft³/s, Oct. 7-9, 1943, minimum daily discharge, 15 ft³/s, backwater from Mississippi River, Feb. 4, 1937, reverse flow of 57 ft³/s, measured by current meter on that date.