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<br />I <br /> 28 <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) (ds) (Ft. MSL) (ds) (Ft. MSL) (ds) (Ft. MSL) (ds) <br />I <br />170 318+70 7943.60 7945.55 510.00 7946.70 1060.00 79117.:l8 1460.00 7948.13 2900.00 <br />I 171 325+55 7967.30 7969.116 510.00 7970.61 1060.00 7971.37 1460.00 7973.32 2900.00 <br /> 7997.62 1060.00 7998.35 1460.00 8000.38 2900.00 <br /> 172 332+35 7994.30 7996.48 510.00 <br />I 172.7 333+30 79'l5.80 7998.72 510.00 8000.11 1060.00 8000.89 1460.00 8002.76 2900.00 <br /> 172.8 333+40 7995.80 7999.55 510.00 8001.77 1060.00 8002.38 1460.00 8003.82 2900.00 <br />I 172.9 333+90 7998.00 8000.79 51 O. 00 8002.30 1060.00 8003.07 1460.00 8004.93 2900.00 <br />I 173 336+20 8006.20 8008.59 510.00 8009.81 1060.00 8010.47 1460.00 8012.14 2900.00 <br />173.9 336+65 8008.30 8010.93 510.00 8012.50 1060.00 8013.05 1460.00 8014.90 291)0.00 <br />I l74.l 336+75 8008.30 8011.81 510.00 8013.77 1060.00 8016.04 1460.00 8017.87 2900.00 <br /> 174.2 337+25 8009.70 8012.62 510.00 8015.25 1060.00 8016.16 1460.00 8017.97 2900.00 <br />I 175 341+95 8025.80 8028.31 510.00 8029.24 1060.00 8029.76 1460.00 8031.02 2900.00 <br /> l76 350+95 8061.70 8063.81 510.00 8064.83 1060.00 8065.42 1460.00 8067.09 2900.00 <br />I <br />177 358+l5 8094.70 8096.56 510.00 8097.39 1060.00 8097.89 1460.00 8099.33 2900.00 <br />I l78 364+05 8141.80 8144.20 510.00 8145.21 1060.00 8145.6B 1460.00 8147.08 2900.00 <br /> 178.9 364+60 8145.30 811$9.36 510.00 8151.33 1060.00 8151.97 1460.00 8153.64 2900.00 <br />I 179.1 364+75 8145.30 8150.86 510.00 81'52.31 1060.00 8153.09 1460.00 8154.67 2900.00 <br /> 179.2 365+55 8149.50 8153.55 510.00 8155.52 1060.00 8156.14 1460.00 8157.34 2900.00 <br />I <br />l80 368+40 8161.30 8163.82 1170.00 81611.13 860.00 8165.33 1180.00 8166.911 2320.00 <br />I l8l 373+20 8184.30 8186.35 470.00 8187.07 860.00 8187.53 1180.00 818A.81 2320.00 <br /> l82 378+40 8207.10 8210.03 1170.00 8211.29 860.00 8212.14 1180.00 8214.22 2320.00 <br />I <br />I <br />I <br /> - --------- <br />