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<br />I 23 <br />I TABLE 6 <br /> FLOOD FREQUENCY - ELEVATION AND DISCHARGE DATA <br />I MIDDLE ST. VRAIN CREEK, BOULDER COUNTY, COLORADO <br />I IO-Year Flood 50-Year Flood IOO-Year Flood 500-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) (cfs) (Ft. MSL) (ds) (Ft. MSL) (ds) (Ft. MSL) (ds) <br />I 138.1 l87+20 7549.90 7553..29 550.00 7555.58 1240.00 7<,57.23 17 30.00 75 SO . 9 0 348;).00 <br /> 138.2 l87+65 75S1. SO 7554.06 5S0.00 7556.27 124;).00 7<,57.17 1730.00 75')9.30 3410.00 <br />I <br />139 192+55 7')65.70 75fi7.73 550.00 756fl.28 1240.00 7568.65 1730.00 7569.57 3480.00 <br />I l40 197+45 7')78.50 7560.38 550.00 7581.47 1240.00 7')82.04 1730.00 7583.20 3480.00 <br /> 140.9 197+70 7578.90 75fl1.73 550. 00 7583.43 1240.00 75E4.15 1730.00 75E5.32 3430.00 <br />I l41. 1 197+85 757'\.'10 7583.18 550.00 7584.04 1240.00 7584.45 1730.00 7585.46 3480.00 <br /> l41. 2 198+3S 7579.60 7583.35 5')0.00 7584.37 1240.00 75E4.89 1730.00 7586.05 3480.00 <br />I l41. 7 201+45 75118.30 75'11.36 550.00 7593.25 1240.00 7594.3.l 1730.00 7595.55 34'\0.00 <br />I l41. 8 201+80 75~jg. 50 7593.26 550.00 7595.04 1240.00 75'15.52 1730.00 75%.71 343(}.00 <br />l41. 9 7589.50 7S94.80 550.00 7597.00 1240.00 75oH.96 3480.00 <br /> 202+00 7597.55 17 30. 00 <br />I 142 202+95 7594.40 759Fi.79 5S0.00 7597.61 1240.00 7597.98 17 30.00 759<).14 3480.00 <br /> l43 208+65 7607.80 7610.01 5S0.00 7610.79 1240.00 7611.24 17 30.00 7f12.18 348(}.00 <br />I 144 214+65 7622.80 7625.10 550.00 7626.95 1240.00 7627.81 17 30.00 7629.98 3480.00 <br />I 144.9 215+05 7623.50 7626.22 550.00 7627.85 1240.00 7628.89 17 10. 00 7630.67 3480.00 <br />l45.1 2l5+20 7623.50 7627.36 550.00 7628.13 1240.00 7630.20 1730.00 7633.09 3480.00 <br />I l45.2 2l5+50 7624.10 7628.44 550.00 7631.20 1240.00 7631.95 1710.00 7633.13 34aO.00 <br /> l45.6 2l6+75 7623.80 7631.18 550.00 7632.63 1240.00 7633.37 17 30. 00 7634.93 3480.00 <br />I 145.7 2l7+O0 762<l.40 7632.17 550.00 7633.25 1240.00 7633.96 1730.00 7635.55 34 ao. 00 <br />I l45.8 217+15 7629.40 7633.41 5<;0.00 7635.68 1240.00 7636.34 1730.00 7637.71 34aO.00 <br /> 7630.00 7634.27 5 <; O. 00 7635.70 1240.00 7636.37 1730.00 7637.77 3480.00 <br /> l45.9 2l7+45 <br />I <br />I <br />I <br />