2012-08-13_REVISION - M1982090 (2)

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Using the above mentioned unit costs, CBCI's total estimated reclamation costs are: • Distribute Cap Materials: 11,200 yd @ $3.10 /yd = $34,720 • Seed Mix: 3 seasons of 201bs /ac @ 4.5ac @$5.25/1b of seed = $1,418 • Scarify and Broadcast Seed: 4.5 acres @ $2,500 /acre = $11,250 • TOTAL RECLAMATION COSTS = $47,388 The desired condition of the surface to be reclaimed will be to equal or exceed the July 2012 vegetative conditions. As per the last DRMS site inspection (September 20, 2011), the vegetative conditions inside the boundary of the 112 permit were considered successful, or nearly so. Rule 3.1.5(7) requires that, upon reclamation, the sedimentation pond slopes cannot be any steeper than 1:2 (V:H), except from 5 feet above and 10 feet below the expected water line where slopes must be 1:3 (V:H). Given the surface dimensions of the planned sedimentation pond these criteria can be met, and the historic detention time of 12 hours at 1,000 gpm can still be achieved. In the event that the sedimentation pond slopes do not meet reclamation criteria CBCI will grade and fill the pond using stored materials from Stockpile 1 if needed. No additional costs are anticipated to do so, since the total volume of materials to be moved does not change. Prior to submitting this TR, CBCI currently has a financial warranty of $25,000 towards reclamation under the 112 permit. Under separate cover, CBCI has submitted an additional $50,000 for financial warranty to the Mined Land Reclamation Board to accommodate reclamation costs for the proposed revisions in this TR. Therefore, the 112 permit currently has financial warranty of $75,000, which CBCI believes is more than adequate to accommodate reclamation of the site. Technical Revision, Camp Bird Mine 112 Permit (Permit No. M- 1982 -090) Page 11