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;~ <br />'~ <br />Table 2 <br />Working Area, haul Road and Loadout Area Ditches <br />Item <br />Ditches <br />Ditch No. <br />Designation <br />Maximum Drainage Area <br />Design Category <br />Design Precipitation Frequency <br />Runoff Coefficient <br />Rainfall Intensify <br />Design Flow <br />Average Slope <br />Roughness Factor, Manning's n <br />Design Depth <br />Design Width <br />Velocity <br /> 7 <br /> Working <br /> Area <br /> Ditches <br />(acres) 103 <br /> Mining <br /> Duration <br />(years) lp <br /> CN78 <br />(in/hr) 0.77 <br />(cfs) P7 <br />(%) 0.4 <br /> 0.03 <br />(feet) 0.9 <br />(Feet) 1.0 <br />(ft/sec) 2.3-10.0 <br />8 9 10 <br />Haul Road <br />Type 1 Type 2 Type 3 <br />38 81 147 <br />Mining Mining Mining <br />Duration Duration Duration <br />10 10 10 <br />0.40-0.61 0,43-0.48 '0.43 <br />0.77 0.77 0.77 <br />18 35 48 <br />5.5 6.0 5.0 <br />0.03 0.03 0.03 <br />1.5 1.1 0,9 <br />2.0 4.0 6,0 <br />9.2 10.2 9,7 <br />11 12 <br />Loading Area <br />Diversion Around Loadout <br />Gossard Loadout Collection Ditches <br />120 7 <br />Mining Mining , <br />Duration Duration <br />10 10 <br />0.34 0.52 <br />0.77 0,77 <br />31 b <br />0.5 3 <br />0.03 0.03 <br />1.5 0.9 <br />4.0 1.0 <br />3.4 5.9 <br />