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NE W M O N T PO Box 1t Goldcorp <br /> PO Box 91 <br /> GOLDCORA 1North3idSt <br /> Vicc ttor,Colorado 80860 <br /> T 775.778.2525 <br /> Cripple Creek & Victor F 775.778,2513 <br /> www.newmont.com <br /> Memo EG19-08 <br /> . . - June 13,2019 <br /> Alyson Boye <br /> Charles Bissue <br /> • Kim Morrison, Jofree Duran <br /> • Stability Evaluation of the Proposed Leach Test Cell <br /> Valley Leach Facility 1 (VLF-1) <br /> This document summarizes the geotechnical evaluation of the Leach Test Cell (Test Cell) that is <br /> proposed to be placed at the 10,130 feet (ft) elevation on the Arequa Gulch Valley Leach Facility <br /> (VLF-1). The purpose to the Test Cell is to evaluate recovery of the ore placed within it. <br /> 1.0 Test Cell Layout <br /> The proposed Test Cell will be placed on an existing haul road on a leached ore section of the <br /> VLF-1, with the toe staked at the 10,130 ft elevation, and will have a lift height that varies from 2 ft <br /> at the southern edge to 30 ft at the northern edge. The Test Cell will be lined to allow the <br /> collection of leached solution (See Figures 1 and 2). <br /> The design and layout of the Test Cell were developed to achieve several key objectives, as <br /> follows: <br /> Develop an effective grading plan for collecting the leached solution to assess recovery; <br /> Provide a geotechnically-stable layout such that acceptable factors of safety(FS)could be <br /> achieved; and <br /> ➢ Locate the Test Cell on an area of VLF-1 that has sufficient space around it such that, in the <br /> case of failure, everything would be contained within the confines of VLF-1 as a contingency. <br /> Page 1 <br />