APALACHICOLA RIVER BASIN CHATTAHOOCHEE RIVER NEAR COLUMBIA, AL GEORGE W. ANDREWS L&D TAILWATER Gage 2343800 FLOOD ELEVATION 113 NOTE: These readings are taken at approximately 7AM 1999 WATER YEAR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 93.00 76.70 76.60 79.70 80.50 80.10 79.38 76.80 76.67 77.80 77.10 76.21 2 82.60 76.60 76.60 77.80 79.00 80.10 77.70 76.57 77.10 77.10 77.00 76.40 3 77.00 77.30 76.80 77.90 85.10 79.40 77.40 76.57 76.90 76.71 77.20 76.10 4 76.90 77.00 77.00 78.60 84.80 79.90 77.20 76.50 76.85 77.10 77.00 76.30 5 76.80 77.20 76.40 78.70 84.90 80.74 77.21 76.80 76.94 77.10 77.20 76.20 6 77.20 77.50 76.30 81.40 85.00 80.80 77.25 77.00 77.20 77.30 77.37 75.90 7 77.40 77.30 76.80 80.10 83.70 76.80 77.10 78.84 77.30 77.60 77.30 76.20 8 76.80 76.90 76.98 77.90 79.30 79.40 76.60 78.50 79.90 77.10 78.10 76.60 9 77.20 76.90 76.70 77.20 77.90 79.30 76.43 77.30 79.20 77.20 77.90 76.50 10 76.80 77.30 76.80 77.22 79.00 79.60 77.32 77.20 79.90 77.00 77.90 76.50 11 77.50 77.22 76.80 0.00 79.40 79.30 76.90 77.40 80.20 76.90 77.20 76.10 12 77.20 77.10 77.00 77.93 80.30 77.30 76.80 76.90 81.30 76.40 77.40 76.70 13 77.00 77.80 76.90 77.10 77.50 76.80 76.90 76.80 79.90 76.60 77.10 75.70 14 77.10 78.10 76.80 77.00 79.08 76.60 76.60 76.90 79.60 77.20 76.60 75.80 15 77.23 77.00 76.90 77.40 79.68 79.56 76.70 76.90 78.60 77.20 76.60 75.55 16 77.30 77.90 77.08 77.30 78.93 78.70 76.90 76.90 77.40 76.90 76.70 75.91 17 77.00 78.10 77.48 76.70 79.30 78.40 76.60 76.70 77.20 76.50 76.20 76.40 18 77.20 78.40 77.40 77.80 78.91 78.50 76.60 76.90 76.90 77.10 76.90 76.20 19 76.90 78.20 77.30 0.00 81.10 78.50 76.30 76.90 76.90 77.10 76.30 76.09 20 77.20 81.00 76.80 77.13 78.80 78.50 76.60 76.90 76.50 77.20 76.80 76.30 21 76.80 77.00 77.20 78.03 79.40 77.20 76.26 76.80 76.30 77.00 76.60 76.40 22 78.00 76.70 79.00 78.01 80.20 79.30 76.90 76.50 76.13 77.14 76.30 76.30 23 77.80 77.70 77.40 77.20 80.20 78.10 76.50 76.70 76.12 77.40 76.06 76.40 24 77.00 81.30 78.00 86.90 80.26 79.90 76.50 76.81 76.49 77.40 76.50 76.11 25 77.10 79.20 79.06 80.00 80.60 79.70 76.50 76.40 76.79 77.38 76.14 75.87 26 76.90 77.20 76.99 78.80 80.00 80.10 76.35 76.49 77.20 77.33 76.17 76.00 27 76.90 76.68 79.40 76.80 79.40 76.90 76.27 76.76 76.70 77.34 76.50 76.00 28 76.90 76.60 78.90 79.73 77.90 80.20 76.37 76.80 78.27 77.20 75.95 76.50 29 76.90 76.30 80.80 80.31 79.80 76.51 76.80 77.76 77.10 76.59 77.10 30 76.80 76.80 80.20 77.53 81.20 76.90 76.78 77.40 77.18 76.30 76.30 31 76.70 81.00 79.60 77.23 76.85 76.70 AVG 77.78 77.57 77.59 73.48 80.36 78.97 76.85 76.93 77.72 76.83 76.22 MAX 93.00 81.30 81.00 86.90 85.10 81.20 79.38 78.84 81.30 78.10 77.10 MIN 76.70 76.30 76.30 0.00 77.50 76.60 76.26 76.40 76.12 75.95 75.55 Established October 1,1975, U.S.G.S. Reading Available Oct 1975 - Present Drainage Area Sq. Mi. 8,210 sq mi Gage Zero Pool and Tail = 0 NGVD