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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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USGS Water-Year Summary 2024
07024500 SOUTH FORK OBION RIVER NEAR GREENFIELD, TN
LOCATION - Lat 36°07'05", long 88°48'39" referenced to North American Datum of 1927, Weakley County, TN, Hydrologic Unit 08010203, on left bank downstream from bridge on U.S. Highway 45E, 1.1 mi downstream from Mosley Branch, 2.5 mi south of Greenfield, and 9.7 mi upstream from confluence with Middle Fork.
DRAINAGE AREA - 383 mi².
REVISIONS HISTORY - WSP 1311: 1936(M). WSP 1920: Drainage area. WDR-TN-2006-2007: Datum incorrectly published as 305.37 ft. On June 19, 2013, the peak discharge for water year 2010 was revised to greater than 38,000 (May 2, 23.99 ft.) and supersedes information published in the 2010 report http://wdr.water.usgs.gov/wy2010/pdfs/07024500.2010.pdf.
SURFACE-WATER RECORDS
PERIOD OF RECORD - July 1929 to February 1988, July 1988 to April 1989, October 2001 to current year. Water years 1990-93, 1997-2001, annual maximum.
GAGE - Data collection platform. Datum of gage is 295.47 ft above NAVD of 1988. From October 1, 2006 to September 30, 2012 datum of gage 295.37 ft above NGVD of 1929, prior to October 1, 2006 at datum 5 ft. higher.
REMARKS - Records generally fair.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, unknown, May 2, 2010, gage height, 23.99 ft.; minimum discharge 61 ft³/s, Aug. 21, 1944.
