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Revised, October 9, 1992 <br />PRODUCTION USING CATERPILLAR 777B HAUL TRUCKS <br />• <br />• <br />COLOWYO COAL COMPANY <br />1991 PERMIT REVISION AND RENEWAL <br />PERMIT BOND CALCULATIONS <br />ROUTE: RT 15L~2 - TOPSOIL <br />HAUL <br />OR SECTION DISTANCE <br />RETURN T (FT.) <br />GRADE SPEED RESISTANCE <br />(%) FACTOR (°s) <br />SP:~:.~ <br />(MP =) <br />HAUL 1 375 -9.90 o.ao 4.00 22.77 <br />HAUL 2 1500 -7.90 0.80 4.00 30.11 <br />TOTAL HAUL 1875 -8.30 0.80 4.00 28.61 <br />RETURN 1 1500 7.90 1.00 4.00 16.50 <br />RETURN 2 375 9.90 1.00 4.00 14.57 <br />TOTAL RETURP7 1a75 8.30 1.00 4.00 16.12 <br />ROUTE:RT 152=2 - TOPSOIL <br />PRODUCTION RATES FOR HAUL TRUCKS <br />TOTAL HAULAGE TIME LOADED = <br />TOTAL RETURN TIME EMPTY = <br />TOTAL CYCLE TIME (MINUTES) _ <br />AVERAGE TRIPS PER HOUR = <br />TOTAL CYDS PER TRIP = <br />TOTAL CYDS PER HOUR = <br />0.7533 <br />1.3254 <br />6.4787 <br />7.7176 <br />67.1000 <br />517.8533 <br />PRODUCTION ASSUMPTIONS FOR HAUL TRUCKS <br />SPOT TIME _ <br />LOAD TIME _ <br />DUMP TIME _ <br />• DELAY TIME _ <br />WORKING MINUTES PER HOUR = <br />0.70 <br />2.70 <br />1.00 <br />0.00 <br />50.00 <br />B-21 <br />