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PE RIO GRANDE <br />E <br />SILKIER, INC_ <br />The existing 36" culvert and steel door covering the portal will be removed and replaced <br />with steel -sets and decking for a distance of 30' into the hillside to intersect the existing <br />wood -frame structural support. A new Portal Gate assembly will be installed for access <br />control. In addition to this work we need to do a minor cut adjacent to the roadway to the <br />portal to allow traffic to pass by the existing Monitoring Well that sits in the middle of the <br />existing roadway. The portal area construction will affect 0.74 Acres in the previously <br />disturbed area and the minor roadway expansion to provide clearance around the <br />monitoring well will affect .07 Acres. See attached Exhibit CC (Plan View) and DD <br />(Construction Details). <br />Expansion of the Waste Rock Storage Facility adjacent to the 9400 Decline <br />. This work will consist of removing and stockpiling the available growth medium from <br />the new WRSF area. The growth medium will be set aside for re -use upon reclamation. <br />The expansion area will be bermed on its perimeter and waddles installed as needed to <br />control erosion and run -off. The expansion will be done consistent with existing <br />approved practices for sloping and construction methods. This expanded area will add <br />3.2 Acres to the WRSF. The new area remains within the previously disturbed area and <br />does not add any additional acreage to the 60 acres of permitted disturbed area. See <br />attached exhibits EE (Operational Plan View) and FF (Operational Cross - Section) as <br />well as exhibits GG (Post- Mining Plan View), HH (Post- Mining Cross - Section), and II <br />(Final Reclamation Cross - Section) for project details. <br />DISTURBANCE ACREAGE <br />The estimated disturbance caused by the proposed action on private and US Forest <br />Service managed lands is shown on Table 1, TR22 — Estimated Disturbance Acreage <br />Table 1, TR22 — Estimated Disturbance Acreage <br />FACILITY <br />LENGTH <br />(feet) <br />PRIVATE <br />(acres) <br />US FOREST <br />SERVICE <br />(acres) <br />TOTAL <br />(acres) <br />Vent Raise Development <br />n/a <br />0 <br />0.17 <br />0.17 <br />9700 Portal Refurbishment <br />n/a <br />0.30 <br />0.51 <br />0.81 <br />WRSF Expansion area <br />n/a <br />0 <br />3.2 <br />3.2 <br />Total <br />n/a <br />0.30 <br />3.88 <br />4.18 <br />Page3 <br />625 USFS Road 504.1A P.O. Box 610 Creede, CO 81130 <br />719 - 658 -1080 Fax: 719-658-1082 <br />