USGS Water-Year Summary 2020
02358700 APALACHICOLA RIVER NEAR BLOUNTSTOWN, FL
LOCATION - Lat 30°25'30", long 85°01'53" referenced to North American Datum of 1927, in NE 1/4 sec.03, T.1 S., R.8 W., Calhoun County, FL, Hydrologic Unit 03130011, on right bank 500 ft upstream from Neal Lumber Company Landing at McNeal, 0.5 mi upstream from Old River cutoff, 1.5 mi southeast of Blountstown, and 78 mi upstream from mouth.
DRAINAGE AREA - 17,600 mi², approximately.
PERIOD OF RECORD - January 1920 to September 1957 gage-height records collected in this vicinity by the National Weather Service are in the files of the Geological Survey. Miscellaneous discharge measurements from some periods August 1938 to August 1957 are in files of the U.S. Army Corps of Engineers, Mobile, Alabama District. October 1957 to current year.
GAGE - Water-stage recorder and data-collection platform. Datum of gage is 26.96 ft above National Geodetic Vertical Datum of 1929 (National Weather Service benchmark). Prior to Sept. 17, 1921, nonrecording gage near present site at different datum. Sept. 17, 1921 to Aug. 28, 1957, nonrecording gage at several sites within 500 ft of present site at present datum. Since Aug. 26, 1960, auxiliary nonrecording gage at site 2.2 mi upstream at bridge on State Highway 20, at present datum.
COOPERATION - Records from October 1957 to September 30, 2012, were collected and computed by the U.S. Army Corps of Engineers and were reviewed by the U.S. Geological Survey.
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum stage since at least 1920, 28.6 ft present datum, Mar. 21, 1929, discharge not determined, from National Weather Service records.
EXTREMES FOR PERIOD OF RECORD - Maximum daily discharge, 266,000 ft³/s, Mar. 13, 1998; maximum gage height, 27.23 ft, Mar. 13, 1998; minimum daily discharge, 4,680 ft³/s (estimated), Aug. 3, 1986.