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FULL BUILD OUT CONFIGURATION <br />APPENDIX B <br />FULL BUILD OUT CONFIGURATION <br />BOWIE NO. 2 MINE <br />PROTECTION OF THE HYDROLOGIC BALANCE <br />GOB PILE NO. 3 <br />STORM EVENTS <br />10 YEAR 24 HOUR EVENT <br />25 YEAR 24 HOUR EVENT <br />100 YEAR 24 HOUR EVENT <br />1 8 INCHES <br />2.1 INCHES <br />2.6 INCHES <br />The information presented for peak flow calculations is developed with the use c <br />SEDCAD The output from SEDCAD follows is summarized on the ditch design sheets <br />The upland run-off areas are shown on Map No 20 The run-ofl <br />curve numbers are developed based upon vegetation and sc <br />types Vegetation data is presented in Exhibit 5 and shown o <br />Map 3 Soils data are presented in Exhibit 7 and shown of <br />Map 4 Drainage plans are shown on Maps 21 1/4 & 3/4 <br />There are three soil types that will be disturbed at the loadou <br />They are Work, Progresso and Potts loam Work and Progress( <br />are soil type C and Potts is a soil type B The C soil type wi <br />be used for the run-off calculations <br />The vegetation study for the loadout is located in Volume II <br />Tab 5 Cover data for the vegetation types is presented i <br />Table I in the vegetation study <br />Disturbed <br />Table 2 -2c -Runoff curve numbers for and and semiarid rangeland: <br />Cover Type - Herbaceous -mixture of grass, weeds brusl <br />Hydrologic Conditior Fair <br />Soil Type - Loam C <br />Curve Number 81 <br />Disturbed <br />Table 2 -2d -Runoff curve numbers for and and semiarid rangeland., <br />Cover Type - Brush -weeds -grass mixture with brush mayor elemen <br />Hydrologic Conditior Fair <br />Soil Type - Loam C <br />Curve Number 70 <br />Disturbed <br />Table 2 -2d -Runoff curve numbers for and and semiarid rangeland, <br />Cover Type - Herbaceous -mixture of grass, weeds brusl <br />Hydrologic Conditior Good <br />Soil Type - Loam C <br />Curve Number 74 <br />Disturbed <br />Table 2 -2a -Runoff curve numbers for urban areas <br />Gravel - including right-of-way <br />Soil Type - Loam Fair <br />Curve Number C <br />Curve Number 89 <br />TR -105 Volume XI, App. B-3 09/15 <br />