2011-11-17_REVISION - C1994082 - Laserfiche WebLink

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INTEROFFICE John Hickenlooper Governor MEMORANDUM Mike King Executive Director TO: Susan.Burgmaler Loretta E. Pineda Director FROM: Jim Stark SUBJECT` Yoast Mine SL -03 Cost Estimate DATE: 15 November 2011 I have completed the reclamation cost estimate for the Yoast Mine's Partial Phase II Bond Release SL -03. The mine's new liability, following the release, will be $2,414,678.00. The Division currently holds a bond in the amount of $4;305,484.00. The Division can release $1,890,806.00 for SL -03. This amount is $264,039.00 less than the amount requested by SCC. The reason the Division's release amount is less than the amount requested by SCC is because the Division recalculated the remaining liability with current costs and the Division is proposing to exclude approximately 3 5.9 acres from the requested Partial Phase 11 Bond Release area. The remaining liability includes structural demolition, well sealing, backfilling, regarding and post- mining drainage channel construction work not included in the Partial Phase I Bond Release SL -02, topsoil replacement and initial seeding for areas not included in the Partial Phase 11 Bond Release SL -03, reseeding of areas that were included in the Partial Phase II Bond Release SL -03, pond removal, site maintenance and equipment mobilization. In SL -03, SCC requested a release of 628.6 acres. The Division is proposing to exclude 35.9 acres of this area, for a total Phase 11 Bond Release of 592.7 acres. The total disturbance at the Yoast Mine (according to the 2010 Annual Reclamation Report) is 848.6 acres. This leaves 255.9 acres that must have the topsoil replaced and be reseeded. The new estimate includes topsoil replacement tasks 040, 041, 043, 044, 046, 049, 053 and 054. These tasks represent the replacement of 379,997 cubic yards of topsoil on the remaining 255.9 acres, for an average replacement depth of 11.05 inches. The remaining topsoil replacement costs are proposed for release.