2013-09-18_REVISION - M1980244 (3)

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Mr. Timothy Cazier, DRMS September 17, 2013 Page 2 Operations at CC &V include the Arequa Gulch Valley Leach Facility ( "AGVLF "), the AGADR facilities and the PSE facilities. The AGVLF, AGADR and PSE are under -lain by synthetic liner systems. CC &V is proposing in this technical revision to extend the liner system in the area where the conveyance pipe lines are utilized for the transfer of solution between the AGADR and PSE within the outer edge of the AGVLF. The PSE pipe line liner extension system will be installed per specifications outlined and approved in Amendment No. 10 for clay and geosynthetic liner installation as an area for ore storage on the AGVLF. AMEC has prepared a design for the PSE pipe line extended liner containment system (attached), that describes a geosynthetic component that will overlay a one (1) foot layer of Soil Liner Fill ( "SLF "). The geosynthetic component consists of 80 mil, single - sided, textured, Linear Low Density Polyethylene ( "LLDPE") with the textured side placed down, installed by a qualified liner contractor under the same specifications approved for the AGVLF. Of the approximate 8,000 ft2 of additional liner proposed as part of this technical revision, approximately 5,500 ft2 of the additional liner will not be covered by Drain Cover Fill ( "DCF ") material. Please also refer to the following attached AMEC drawings for additional details: • Drawing # A100 - PSES Pipe Rack Liner Extension Layout • Drawing # A110 - PSES Liner Extension Sections • Drawing # A120 —PSES Liner Extension Details Construction quality assurance will be provided by AMEC. An as -built and certification report will be submitted to DRMS in a timely manner upon completion of the project. CC &V has reviewed this minor change for impacts to the financial warranty calculations. The cost of reclamation for the additional lined facility has been captured under the calculations for the AGADR facilities in Amendment No. 10, Volume VII, Appendix 11. Therefore, no additional financial warranty for this portion of technical revision is necessary. Power Pole Maintenance Road/Platform Operations at CC &V include the Squaw Gulch Valley Leach Facility ( "SGVLF ") and the Squaw Gulch Adsoption, Desorption and Recovery facilities ( "SGARD "). As approved in Amendment No. 10 to Permit No. 1980 -244, the operations of those facilities will require the installation of a new power line as presented in Drawing C -3: Proposed Facilities — Buildings and Utilities. As part of the new power line to be installed to supply power to these facilities, CC &V is proposing the placement of and access road /platform to provide access to the power line from State Highway 67 to servicing these facilities. This access road /platform will be a permanent feature on the surface of the outer portion of the toe berm. Please also refer to the following attached drawings for additional details: • Drawing: Power Pole Maintenance Road Exhibit — dated August 14th, 2013 • Drawing: Power Pole Maintenance Road Exhibit —dated August 1St, 2013