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Mr. Ross Gubka, P.E. Western Fuels-Colorado February 9, 2007 Page - 8 - this to be in error, the Division can utilize site specific data of the weight of the spoil at New Horizon if it is provided. 5. This item has been discussed under General Comment #1, above. Task # 02b 1. This comment is discussed in Task # 001 Item 1, above. 2. This comment is discussed in Task # 001 Item 2, above. 3. This comment is discussed in Task # 001 Item 3, above. 4. This comment is discussed in Task # 001 Item 4, above. 5. This item has been discussed under General Comment #1, above. Task #003 This comment is discussed in Task # 001 Item 1, above. This comment is discussed in Task # 001 Item 2, above. 2. This comment is discussed in Task # 001 Item 3, above. 3. This comment is discussed in Task # 001 Item 4, above. 4. This item has been discussed under General Comment #1, above. Task #004 - to be revised when accurate volume is established I. The unadjusted drill rate is based on a rotary blast hole drill in medium density rock. If WFC has site specific data from its blasting contractor, the Division will review that data and apply it to our cost estimate if we believe it is warranted. 2. The altitude correction factor (percent of flywheel horsepower available at given altitudes) is different for each piece of equipment, depending on the engine type and horsepower. For example, a D8R bulldozer operating at altitudes between 5000 and 7500 feet would provide 100 percent of flywheel horsepower, but a 966G loader would only provide 92 percent. The Caterpillar Handbook illustrates a range as low as 81 percent for some pieces of equipment at altitudes between 5000 and 7500 feet. A rotary blast hole rig will provide 97 percent flywheel horsepower at 5700 feet. 3. The job efficiency factor of 0.67 was in error and will be revised to 0.83.