Laserfiche WebLink
James A. Kilter <br />Z9 Sep 9i <br />Page 3 oj6 Pages <br />a. On page B-5, Colowyo's estimate does not include a dump and maneuver time (should <br />be 0.6 minutes). Please revise the estimate as appropriate. <br />b. On Page B-3, CDMG measured the haul distance at 4,100'. Colowyo used 3,535'. <br />Please verify the haul distance or revise the estimate. <br />c. Colowyo based its production on a 54 minute hour. As agreed upon in 1991, the basis <br />for single shift topsoil replacement is a 50 minute hour. Please revise the estimate as <br />appropriate. <br />d. Colowyo did not include an altitude deration in its estimate. At elevations at or above <br />7500, the Caterpillar Handbook suggests an altitude deration factor of 0.95 fora 637E, <br />and 0.92 fora 627E. Please include an altitude deration in the estimate. <br />4. With regard to truck and loader productivity sheets: <br />a. The first segment of (equipment travel route) 15AII, on page B-23, is 0.0% in the <br />Colowyo estimate. CDMG measured the segment slope at +3.6%. Please verify or <br />revise the estimate. <br />b. The Caterpillar Handbook indicates the maximum heaped capacity of a 777C haul <br />truck is 67.10 loose cubic yards (Icy). Colowyo used (estimate) 78.22 Icy. Please revise <br />the estimate. <br />5. For all of the earthmoving tasks, Colowyo uses the same value for material density whether it <br />is bank or loose. The Caterpillaz Handbook uses a higher weight for bank material than for <br />loose. Please revise the estimate or explain use of the constant value. <br />6. For topsoil replacement tasks, Colowyo uses a material weight of 2,500 pounds when moved <br />by scraper, and 2,400 when moved by truck. Please revise the estimate or explain this <br />discrepancy. <br />7. With regard to facilities demolition costs: <br />a. Conveyor removal costs used by Colowyo are $10.92 per linear foot. This is <br />acceptable for overland conveyors. Please revise the costs for elevated portions using <br />$30.00 per linear foot, as in the 1991 estimate. <br />b. In addition to the tank removal costs estimated by Colowyo, CDMG anticipates an <br />additional cost to haul the tanks to a certified dump, and to insert dry ice into the tanks for <br />