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7. Remove Foundations at Whirlwind and Packrat Portals <br />• The shop and dry/admire building rests on a concrete foundation that is 60 feet x 50 feet x 6 inch <br />thickness with rebaz. This is a volume of 56 cubic yards of concrete. The material will be removed <br />with a Cat D-7 dozer equipped with a hydraulic concrete breaker or equivalent. The material will be <br />loaded in trucks and hauled underground or off site. The cost of this removal is $24 per cubic yard and <br />the disposal is $7 per cubic yard. Therefore, the total estimated cost is $1,736. <br />The used oil tank pad will be 8 feet x 10 feet x 4 inches thick with no rebaz. This is 1 cubic yazd. Since <br />this is a small foundation, it will incur a higher cost compazed to above, therefore, this cost is $100. <br />The Packrat bins will have up to 16 concrete footers of 3-foot depth and 2-foot diameter. These will <br />cost $150 each to remove x 16 footers = $2,400. <br />The total cost for this task is estimated to be $4,236. <br />• 8. Install Bat Gate at Packrat Portal and Seal Shop Area <br />A steel bat gate will be welded into place at the main Packrat portal. The gate will cost an estimated <br />$2,400 to fabricate and install. A 8-foot by 12-foot block wall will be constructed over the door <br />opening into the underground shop at an estimated cost of $500. The total cost for the Packrat portal <br />azea is $2,900. <br />9. Backfdl Treatment Ponds and Collection Ditches <br />The sediment and water treatment ponds must be backfilled. Estimated fill volumes in cubic yards (cy) <br />include: <br />Sediment Pond: 4608 cy (Will not be backfilled immediately after mine shutdown) <br />Lined Untreated Water Pond: 792 cy <br />Sludge Storage Pond: 64 cy <br />.~ Treated Water Pond: 52 cy <br />Whirlwind Mine June 07 E-9 <br />