Laserfiche WebLink
Terror Creek Mid-Term - 5 - February 12, 1986 <br />BOND CALCULATIONS REVISED <br />Pro uctivrty Estimates rom <br />Caterpillar Performance Handbook Edition 15 <br />Debris Removal from Pad Area <br />y s coa ase <br />Use D9L crawler tractor with "U" blade and double shanked ripper <br />Average push distance - 100' level <br />Base Productivity - 1,475 LCY/hr unadjusted <br />Production Factors <br />Average Operator 0.75 <br />Slot Dozing 1.20 <br />Job Efficiency 0.84 <br />Load Factor 0.74 (coal) <br />Material 1.20 <br />1,475 x .75 x .84 x 1.20 x 1.20 = 1,338 LCY/hr. adjusted production <br />BCY = LCY x Load Factor <br />BCY Production = 990 BCY/h r. <br />Time = 2,807 BCY - 990 BCY/hr = 3 hours <br />Placement of colluvial material over debris (4 feet) <br />4,138 BCY material - push distance average 100' <br />Production with load factor = 1,003 BCY/h r. <br />4,138 BCY - 1,003 BCY/hr = 4 hours <br />Backfilling and Grading <br />Pad Area <br />Use D9L crawler tractor with "U" blade and double shanked ripper <br />850 LCY/hr unadjusted <br />Production Factors <br />Average Operator <br />Slot Dozing <br />Job Efficiency <br />Load Factor <br />Grade <br />Material <br />0.75 <br />1.20 <br />0.84 (50 min. hr. efficiency) <br />0.75 (decomposed rock & earth, 50/50) <br />0.85 (10%) <br />0.80 (non-cohesive) <br />= 850 x .85 x .75 x .84 x 1.20 x 0.75 x .80 = 327 BCY/hr adjusted <br />Time = (74,000 BCY - 4,138 BCY) - 327 = 69,862 - 327 = 214 hours <br />Light Use Road <br />Utilize D9L Dozer with "U" blade <br />Unadjusted Productivity = 2,400 LCY/hr <br />