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Revised, October 9, <br />PRODUCTION USING CATERPILLAR 777B HAUL TRUCKS <br />I <br />1 • <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 GRADE SPEED RESISTANCE SPEED <br />RETURN m (FT.) (%) FACTOR (%) (MP3} <br />HAUL 1 375 -9.90 0.80 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.fit <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 RETURN"7 1375 8.30 I.00 4.00 16.12 <br />ROUTE:RT 15I„2 - TOPSOIL <br />PRODUCTION RATES FOR HAUL TRUCKS <br />TOTAL HAULiGE TIME LOADED = 0.7533 <br />TOTAL RETURN TIME EMPTY = 1.3254 <br />TOTAL CYCLE TIME (MINUTES) = 6.4787 <br />AVERAGE TRIPS PER HOUR = 7.7176 <br />TOTAL CYDS PER TRIP = 67.1000 <br />TOTAL CYDS PER HOUR = 517.8533 <br />PRODUCTION ASSUMPTIONS FOR HAUL TRUCXS <br />SPOT TIME = 0.70 <br />LOAD TIME = 2.70 <br />DUMP TIME = 1.00 <br />DELAY TIME = 0.00 <br />WORKING MINUTES PER HOUR = 50.00 <br />B-21 ~ <br />