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• <br />. <br /> TABLE 13-7 <br /> Summary of Wa[er sh ed Pa ramete[s, Peak Flcw, and <br /> Design St attstics for Culverts in Mine Fe rrtiit Area, <br /> Seneca II-W Mine, RoutC County, Colorado. <br /> WATERSHED PARAMETER <br /> Selected <br /> Peak Discharge Culver[ Culvert HW <br /> Area Lenyth Relief 10-YC., 24-H r. Leng[h Diameter Required <br />Culvert (Ac) (Mi) (Ftl CN (CF51 IFt.) (In.) (Ft)(21 <br />{{RC-A1 774.0 2.13 955 76 65.2 ~ 143 72 3.1 <br />HRC-A3 41.2 0.68 225 BO 12.6 80 24 2.1 <br />HRC-AS 135.2 0.79 475 76 23.7 142 36 2.5 <br />HRC-A6 39.6 0.96 230 89 7.0 160 36 2.7 <br />HRC-A7 38.4 O.4B 175 89 26.2 160 36 2,6 <br />11RC-B2 29.7 0.49 201 BO 8.8 120 36 1.3 <br />HRC-B3 16.6 0.23 150 B6 10.1 ~ 120 30 1.6 <br />f{RC-B4 7.B O. J.3 210 80 2.9 200 24 0.8 <br />HRC-BS 249.7 0.91 555 86 65.9 160 48 4.1 <br />h{RC-B6 189.6 0.38 270 91 86.9 160 46 5.0 <br />HRC-C1 146.1 0.85 425 86 75.1 140 46 4.5 <br />{IRC-F3 (Revised) 127,6 1.02 715 51 96.5 60 q6 5,6 <br />HRC-F4 10U.5 0.77 430 91 78.4 100 46 4.6 <br />HRC-G1 9510.9 2.12 630 70 174.1 120 72 5.9 <br />HRC-G2 784.1 0.85 550 78 94.8 160 6U J.4 <br />c~.1 HRC-G3 746.3 1.24 810 78 96.2 300 6U 4,5 <br />I HRC-G5 258.4 0.41 230 86 40.4 240 36 3.6 <br />~ HRC-H1 <br />~ 121.6 (11 I11 111 8.5 120 24 2.0 <br />kiRC-H2 51.3 (11 (11 I1) 4.1 150 18 1.5 <br />NRC-H3 11.5 I11 (11 I11 2.9 30 18 1.5 <br />I{RC-T4 26.5 0.30 130 60 9.9 BO 24 1.B <br />Note: 111 See individual SEDCADt information in Attachment 13-7 <br />(D <br />C <br />W <br />N <br />N <br />a <br />0 <br />m <br />0 <br />w <br />w <br />