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<br />I l7 <br />I TABLE 6 <br /> FLOOD FREQUENCY - ELEVATION AND DISCHARGE DATA <br />t SOUTH ST. VRAIN CREEK, BOULDER COUNTY, COLORADO <br />I la-Year Flood 50-Year Flood lOa-Year Flood SOO-Year Flood <br />Ref. Station Stream Bed Crest Peak Crest Peak Crest Peak Crest Peak <br />Point Fr. Mouth Elevation Elevation Discharge Elevation Discharge Elevation Discharge Elevation Discharge <br /> Number (Feet) Identif . (Ft. MSL) (Ft. MSL) (ds) (Ft. MSL) (ds) (Ft. MSL) (ds) (Ft. MSL) (ds) <br />I 73 420+40 6580.00 650.75 1290.00 6586.38 3100.00 6587.54 4480.00 6590.89 9710.00 <br />I 74 424+80 t594.00 6598.1f> 1290.00 6600.80 3100.00 6602.50 4480.00 6607.02 9710.00 <br /> 75 435+70 6635.10 6640.09 IdO.OO 6643.06 3100.00 6644.77 4480.00 6649.75 9710.00 <br />I 76 446+30 6673. ao 6678.12 1220.00 6680.49 2790.00 6681.91 3990.00 6685.73 8560.00 <br /> 77 456+40 6706. CO 6709.67 1220.00 6711.98 2790.00 6713.28 3990.00 6717.28 8560.00 <br />. 78 468+00 6742.80 6746.95 1220.00 6749.47 2790.00 6751.10 3990.00 6755.17 8560.00 <br />I 79 473+60 6765.50 6770.32 1220.00 6772.85 2790.00 6774.29 3990.00 6778.58 8560.00 <br />80 478+70 6791.29 2790.00 6792.73 3990.00 6796.83 8560.00 <br /> 6784.20 6788.71 1220.00 <br />I 81 484+20 6804.20 6807.05 1220.00 6808.65 2790.00 6809.56 3990.00 6812.52 8560.00 <br /> 82 488+60 6813.40 6817.84 1220.00 6820.02 2790.00 6821.16 3990.00 6824.35 8560.00 <br />I 83 493+50 6837.20 6840.31 1220.00 6842.29 2790.00 6843.~1 3990.00 6847.12 8560.00 <br />I 84 502+60 6872.20 6875.95 1220.00 6878.17 2790.00 6879.55 3990.00 6883.97 8560.00 <br />84.7 503+05 6874.00 6877.69 1220.00 6879.88 2790.00 6881.12 3990.00 6885.11 8560.00 <br />I 84.8 503+20 6874.00 6878.J7 1220.00 6880.79 2790.00 6881.20 3990.00 6886.78 8560.00 <br /> 84.9 503+65 6876.00 6879.70 1220.00 6881.88 2790.00 6883.11 3990.00 6887:12 8560.00 <br />I 85 508+45 6888.10 6891.09 1220.00 6892.55 2790.00 6893.47 3990.00 6896.39 8560.00 <br />I 85.9 508+80 Forest Service Bridge 6889.40 6893.64 1220.00 6896.31 2790.00 6898.13 3990.00 6902.44 aS60.00 <br />.86.1 509+00 6889.40 6895.12 1220.00 6898.36 2790.00 6900.30 3990.00 6902.66 8560.00 <br />I 86.2 509+70 6893.00 68<)7.25 1220.00 6899.90 2790.00 6901.58 3990.00 6906.05 8560.00 <br /> 87 513+60 to902.40 69C6.37 1220.00 6908.59 2790.00 6910.04 3990.00 6913.70 8560.00 <br />I <br />I <br />I <br />