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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />TA8LE 6 (Continued) <br /> <br />FLOOD FREQUENCY-ELEVATION AND DISCHARGE DATA <br />Upper Lefthand Creek Boulder County, Colorado <br /> <br /> Di stance Stream 1/ 10-Year 50-Year 100-Year 500-Year <br />Reference From Bed Flood Peak Flood Peak Flood Peak Flood Peak <br />Point Mouth Elevation Elevation Discharge 2/ Elevation Discharge 11 Elevation Discharge 2/ Elevation Di scharge 21 <br />Number Ft. Identification Ft.-m.s.l. Ft. -m. s.1- c.f.s. - Ft.-m.s.1- c. f.s. Ft.-m.s.l. c.f.s. Ft.-m.s.1- c.f.s. <br />258 1038+46 Lefthand 6494.0 d/s 6495.7 6498.4 6499.9 6503.5 <br /> Canyon Drive u/s 6499.3 6507.7 6509.1 6512.8 <br />259 1038+88 6495.5 6499.3 6507.7 6509.1 6512.8 <br />260 1045+29 6518.8 6521.1 6523.3 6524.9 6529.0 <br />261 1054+32 6550.4 6553.2 6556.8 6558.5 6563.6 <br />262 1060+62 6592.6 6595.2 6598.5 6600.6 6605.7 <br />262.1 1064+66 6610.7 6613.9 6616.2 6617.3 6620.8 <br />263 1064+88 Pri vate Dri ve 6610.7 d/s 6613.9 6616.2 6617.3 6620.8 <br /> u/s 6615.6 6619.9 6621. 2 6624.1 <br />264 1065+10 6611.8 6615.6 6619.9 6621.2 6624.1 <br />265 1070+97 6629.4 6632.1 6635.0 6636.9 6642.4 <br />266 1073+75 6642.7 6645.2 6648.4 6650.3 6655.5 <br />266.1 1078+42 6669.3 6672.8 6677 . 2 6680.0 6686.2 <br />267 1078+87 Private Drive 6672.9 d/s 6672.8 6677 . 2 6680.0 6686.2 <br /> u/s 6679.4 6685.4 6687.4 6693.3 <br />268 1079+32 6675.3 6679.4 6685.4 6687.4 6693.3 <br /> 1080+85 Nugget Gulch d/s 430 2030 3570 10090 <br /> u/s 420 1990 3510 9920 <br /> <br />l! Low water elevation as determined by aerial photogrammetric methods. <br />11 Discharges are prorated between stations. <br /> <br />17 <br />