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i • - • <br /> Table 1 <br /> Summary of Watershed Parameters, Peak Flow, and <br /> Design Statistics for Culv erts in the Tie-Across Haul Road <br /> Seneca I I-W Mine, Ro utt County, Colorado. <br /> <br /> Peak Discharge Culvert Selected HW <br /> Area Length Relief 10-Yr, 24-HR Length Culvert Required <br />Culvert (Ac) (Mi) (Ft) CN (CFS) (Ft) (in) (Ft)(3) <br />TAHRC-1 35.2 0.25 40 85 17.5 120 24 2.8 <br /> (1)(2)(4) <br />TAHRC-2 40086.6 12.12 1945 70 1565.9 120 108 13.2 <br />TAHRC-4 115.2 0.64 55 81 39.5 120 36 3.6 <br /> (1)(2)(4) <br />TAHRC-5 2191,2 2.90 1000 80 630.6 140 72 10.1 <br />TAHRC-6 22.4 0.43 170 85 11.2 90 30 1.7 <br />TAHRC-6A 12.2 0.27 185 85 6.9 80 30 1.3 <br />TAHRC-7 407.4 1.19 220 83 101.5 120 60 4.6 <br />TAHRC-9 52.4 0.35 40 85 22.1 270 24 3.8 <br />TAHRC-10 9.7 0.14 80 89 7.3 60 24 1.5 <br />TAHRC-11 4.9 0.14 80 89 3.7 50 24 1.0 <br />TAHRC-12 19.3 0.19 58 89 14.5 290 24 2.4 <br />TAHRC-13 12.4 0.21 62 89 9.2 100 24 1.7 <br />TAHRC-16 16.2 0.53 125 85 7.7 90 24 1,5 <br />TAHRL-17 164.9 0.76 207 83 60.8 120 42 4.3 <br />TAHRC-18 14.0 0.33 65 89 9.0 120 24 1.7 <br />TAHRC-19 31.5 0.59 92 89 19.8 60 24 3.3 <br />(1) Culvert redesigned in accordance with Rule 4.03 .1 (4)(e)(i) for 25-yr., 24-Hr. event. <br />(2) Culvert designed with HW/D ratio of 1.5. <br />(3) Minimum cover over the top of culverts = Minimum 2 feet. <br />(4) Two culverts required. <br />