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BLE 1 <br />,INAGE STRUCTURES <br />ItAINAGE DITCHES <br />25 YEAR - 24 HOUR <br />TH = 2.60 INCHES <br />EPTH = 0.30 FEET <br />[PRAP BOTTOM MAXIMUM DEPTH PEAK <br />MAX. WIDTH SIDESLOPE INCLUDING FLOW <br />tCHES) (FEET) RATIO FREEBOARD (CFS) <br /> EET <br />4.5 3.0 2 : 1 1.39 26.87 <br />3.0 3.0 2 : 1 .51 3.10 <br />3.0 3.0 2 : 1 .57 3.41 <br />4.5 3.0 2 : 1 1.12 22.38 <br />• <br />.ULVERTS <br />25 YEAR - 24 HOUR <br />ttnuvra~-.uGriH = 2.601NCHE5 <br />CULVF,RT DESIGN DISCHARGE <br />(CFS SIZE <br />INCHES <br />UDD-4 ROAD CULVERT 22.38 48 <br />(SEE NOTE # 1) <br />TRUCK LOADOUT 6.59 48 <br /> <br />CULVERT NOTES: <br />CULVERT SIZE INCREASED FROM 45" TO 48" TO PROVIDE A HIGHER FACTOR OF <br />SAFETY AND EASIER AVAILABILITY. <br /> <br />Nalional Xing Coal LLG <br />King Mine 17 <br />May 2006 <br />Page 4 <br />