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C~ <br />1r1 <br />u <br />• <br />JEFF: CANYONVSURFACE MINE -FILL AREAS - DITCH SUMMARY <br /> <br />Fill Ditch-Storm <br />Design Size Discharge <br />(cfs) Slope <br />("fin) t <br />Material <br />Depth (ft) <br />Width (ft) <br />Shape <br />9 D94-100 29.36 25 1.25' Riprap 0.52 9.10 6' Trap <br />9 D95-10 5.52 5 Earthen 0.69 15.55 Tri <br />9 D96-10 25.7 2 Cobbles 1.8 8.9 Tri <br />9 D97-10 1.0 4 Cobbles 0.4 11.8 10' Trap <br />9 D98-10 26.7 9 Vegetated 1.2 13.1 6' Trap <br />9 D99-10 LI 6 Vegetated .5 5-6 3' Trap <br />'Riprap diameter is D50 <br />5 % insloped benches serve as Viangular channels with 2.5:1 and 20:1 (H:V) sideslopes <br />475-Exhibit 15 Table Ditch Summary(Apc03 02).doc <br />(revised 4/3/02) <br />