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.~ • • DIVISION OF MINERALS AND GEOLOGY Deparlmenl of Natural Resources 1313 Sherman St., Room 215 Denver, Colorado 80203 Phone: (3031 866 3567 FA%: 1303) 832-8106 GEOLOGY RECLAMATION MINING•SAFETY November 10, 1999 Mr. Scott E. Johnson Slunmit Engineering Co. 1317 State Ave. Alamosa, CO 81101 RE: Pit I (File M-99-073) Preliminary estimate of reclamation cost Dear Mr. Johnson Given the Board's requvement that a permit be issued for [his proposed operation by November 26, 1999 and the possibility [ha[ your response to the Division's adequacy review will take most, if not all, of the time remaining before that date, 1 have attached a preliminary estimate of the cost of reclaiming Pit l if there is a commitment made that the pit slopes will be maintained at a 3:1 slope or less through out the mining phase. If such a commitment is made and backfilling or other highwall reduction is not necessary prior to reclamation, then the Division's attached estimate of the cost of reclaiming Pit I will apply. The Division's preliminary estimate of the total cost of reclaiming Pit I is $8500.00. The estimate is based on just 3 tasks, i.e. spreading topsoil to the disturbed area from the topsoil stockpile indicated on the maps included with the permit application, seeding the site with the proposed seed mix at the rate specified and securing contractors with the necessary equipment to reclaim the site from San Luis. As is also necessary, Contractor's overhead and profit together with [he Division's administration fee are also included. DIVISION OF MINERALS Bill Owens Governor Greg E. watcher Eseculrce DveUO~ Michael B. Long Drvisiun Director TASK 1-BACKFILLING OR HIGH WALL REDUCTION: There is no Task 1 so long as a commitment is made to maintain the pit slopes at 3:1 or less throughout the mining phase. TASK 2-SPREADING THE TOPSOIL: For the estimate of the cost of this task, I used a DSN dozer which is (or the equivalent is) widely available. I used 9.8 acres of disturbance covered with 6 inches of topsoil for the volume of material [o be spread, considering a routine swell factor. The push distance employed is an average of the distance from the center of the topsoil stockpile to the centers of the four areas indicated on the reclamation plan map. Thejob condition correction factors are based on the material, average work conditions, site character, etc. TASK 3-REVEG: For this estimate, the seed mix and rate of application proposed in the application were considered. The seeding method and seed bed preparation are standard. No costs for fertilizer or mulch were included since no mention was made of this in the application. ~TaT~ OF COLORADO III IIIIIIIIIIIIIIII L~ TASK 4-MOB/DEMOB: This estimate is self-explanatory.