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iii iiiiiiiiniii iii 999 The Corley Company Phone 6325050 P.O. Box 1621 COLORADO SPRING 6.COL0 RADO 60901 Nov. 13, 1993 Mr. Daniel I. Hernandez Division of Minerals & Geology 1313 Sherman St. Denver CO 80203 Dear Mr. Hernandez: RE~^E !i~~: (:; NOV 15 1993 Di:•i`:C^ t. :.i.:: .. C C„ We have the following comments about Mr. Ranney's reply to our first comments about the East Pit plan. Perhaps as an aide to us, you could demonstrate on the cross section EE', the perspective map, and the topo map the 35 foot cut of the top of Chen's hill, please. We have tried to show that your cost estimates are inaccurate in at least two areas. A check with the Caterpillar dealer indicates that it would cost $5500 per each D10 to move in and out of the job from Denver. Your estimate is about $1000 per machine or approximately $18,000 too low. Your estimate for seeding is about $400 per acre less than what your Division requires for bonding estimates for seeding or approximately $30,000 too low. Is your approach to cost estimating the reason than the Harrison Western final payment of $18,500 is approximately $14,500 too low? We understand that the low bid will be the determing cost, but grossly under estimating the cost of the proposed work will result in the same problems as the West Pit: too little money for too much work. The two concerns mentioned above show the realistic cost to be about $48,000 more than the available bond money. With regard to diversion ditches, Mr. Berry of your Division stated that permanent diversion ditches should be sized for a 100 year 24 hour event, yet some are to be only sized for a 25 year event. It would seem more scientific to measure the volume of the topsoil piles instead of assuming their volumes to equal the volume required to cover 76 acres with 0.5 feet. The question: "Is it a good practice to rob an undisturbed area [for topsoil]?" has not been answered. The road plans have not been clarified. Mr. Acre of Energy Fuels has stated that the landowner from Sec. 31 may not pass through the Southfield Mine area. It is possible that you might receive access over the old access road, but it is over land that we do not own. We would readily allow the closure of the present road if you can provide us with an easement for the old road and if Energy Fuels agrees to the closure of what now is their permitted road. Sincerely, ~C/ W.D. Corley, Jr. President