2008-05-09_REVISION - C1981022 (2)

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STATE OF COLORADO DIVISION OF RECLAMATION, MINING AND SAFETY Department of Natural Resources 1313 Sherman St., Room 215 Denver, Colorado 80203 Phone: (303) 866-3567 FAX: (303) 832-8106 INTEROFFICE MEMORANDUM TO: Marcia Talvitie FROM: Jim Stark SUBJECT: Oxbow PR-OS Cost Estimate DATE: 9 May 2008 COLORADO DIVISION O F RECLAMATION MINING - &- SAF ETY Bill Ritter, Jr. Governor Harris D. Sherman Executive Director Ronald W. Cattany Division Director Natural Resource Trustee Attached is the reclamation cost estimate for the Elk Creek and Sanborn Creek Mine's Permit Renewa105. The estimate is 100 tasks (a summary sheet and tasks OOa-130) and represents a new liability of $4,008,068.00. This new liability is an increase of $134,745.00 over the current liability of $3,873,914.00 and an increase of $96,022.00 over the current bond held of $3,912,042.00. The amount to enter on the appropriate proposed decision coding form is +$96,022.00. This estimate is only an update of costs since the 2006 Midterm Review, dated 11 April 2006. Additionally, all the reclamation cost estimates for the Minor Revisions and Technical Revisions that have been approved since the 2006 Midterm Review have been updated and included in this estimate. These Revisions include MR-78, 79, 80 and 81 and TR-54, 56, 57 and 58. The increase in-the mine's liability is due to equipment and material cost increases since the last reclamation cost estimate calculation. No other inputs have been changed. The following chart shows the equipment and riprap cost increases that contributed to the increase in liability. Item Cost Rlv-OS Cost 2006 MTR Cost Difference Hourl D9R Dozer $ 207.53 $ 194.45 $ 13.08 Hourl 637E Scra er $ 313.18 $ 288.53 $ 24.65 Hourl 330C Excavator $ 139.63 $ 124.74 $ 14.89 Hourl 14H Grader $ 116.18 $ 106.92 $ 9.26 Ri ra -Per Yard $ 66.00 $ 43.10 $ 22.90 Office of Office of Mined Land Reclamation Denver Grand Junction Durango Active and Inactive Mines