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USGS Water-Year Summary 2024
02420000 ALABAMA RIVER NEAR MONTGOMERY, AL
LOCATION - Lat 32°24'41", long 86°24'30" referenced to North American Datum of 1927, Montgomery County, AL, Hydrologic Unit 03150201, on pier near midstream of bridge on U.S. Highway 31, 4 mi upstream of Autauga Creek, 6 mi northwest of Montgomery, and at river mile 287.6.
DRAINAGE AREA - 15,087 mi².
REVISIONS HISTORY - WSP 1142: 1929. WDR AL-80-1: 1978. WDR AL-84-1: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - January 1899 to December 1904, October 1999 to September 2001 (gage heights only). October 1927 to September 1990. October 1990 to September 2001 (flood hydrograph). October 2001 to current year. Published as "at Montgomery" 1899-1903.
GAGE - Water-stage recorder. Datum of gage is 97.90 ft above NGVD of 1929. January 1899 to December 1903, nonrecording gage at site 9.3 mi upstream at different datum (station 02419988). Auxiliary gage located 3.0 mi downstream on right bank for period Feb. 18, 1970 to Sept. 30, 1991. Mar. 27, 1951 to Feb. 17, 1970 National Weather Service nonrecording gage (station 02419988) used as auxiliary gage.
REMARKS - Estimated values: February 24-28, 2017. Record considered fair except for estimated period, which was poor.
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum stage since 1833, 62.7 ft, Apr. 1, 1886, from floodmarks, discharge 322,000 ft³/s, from rating curve extended above 276,000 ft³/s. Flood of Mar. 30, 1888, reached a stage of 60.6 ft, from floodmarks, discharge, 283,000 ft³/s, from rating curve extended above 276,000 ft³/s. Elevations of floodmarks of both floods referred to National Weather Service gage 9.3 mi upstream and transferred to present site by gage height relation curve.
EXTREMES FOR PERIOD OF RECORD - Minimum discharge prior to 1972, 2,180 ft³/s, Nov. 24, 1941, since 1972 negative flows for part of many days; minimum gage height, -2.2 ft, Sept. 26, 1954.
