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CYPRUS ORCHARD VALLEY COAL CORPORATION <br />DRAINAGE DITCH DESIGN SUMMARY: <br />• 10-YEAR 10-YEAR 100-YEAR 100-YEAR <br /> SLOPE PEAKFLOW VELOCITY PEAKFLOW VELOCITY <br />SECTION PAGE J/B/S (°s) (cfs) (fps) (cfs) (fps) <br />TIMBER STORAGE AREA DRAINAGE AREA (REFER TO MAP N0. 8-2): <br />1 D60 111 3.0 2.62 3.72 N/A N/A <br />2 D61 121 3.0 0.17 1.90 N/A N/R <br />3 D62 212 5.0 4.14 5.06 N/A N/A <br />4 D63 221 10.0 0.23 3.29 N/A N/A <br />5 D64 311 5.0 4.75 4.87 N/A N/A <br />6 D65 321 7.7 4.90 5.13 N/A N/A <br />TRAIN LOADOUT DRAINAGE AREA (REFER TO MAP N0. 8-3): <br />7 D66 111 2.0 9.28 3.78 N/A N/A <br />------------------------------------------------------------------------------ <br />u <br /> <br />03 i <br />