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■NewFields <br /> Perspective,Vision. Solutions. <br /> TECHNICAL MEMORANDUM <br /> 9400 Station Street <br /> Suite 300 <br /> Lone Tree,CO 80124 <br /> T: 720.508.3300 <br /> F:720.508.3339 <br /> To: Cripple Creek and Victor Gold Mining Company <br /> From: Jay Janney-Moore, P.E. <br /> Reviewed By: Keith Williams, P.E. <br /> Project: Liner Integrity Engineering Support <br /> Project No: 475.0106.023 <br /> Subject: VLF2 Ore Stacking Guidelines <br /> Date: 2 May 2018 <br /> . ..... .............................. ... ... ...... ..........I.... ... . ............ ......... <br /> NewFields has reviewed existing documents with the intent to consolidate information and <br /> provide recommendations to Cripple Creek and Victor Gold Mining Company (CC&V) regarding <br /> the ore stacking requirements for the Squaw Gulch Valley Leach Facility(VLF2). <br /> 1.0 BACKGROUND <br /> The following documents were reviewed and included information related to ore placement: <br /> Filtered Tailings Storage in Arequa Gulch VLF letter, dated April 22, 2011 <br /> Cripple Creek & Victor Gold Mining Company, Squaw Gulch Leach Facility Design report <br /> dated September 1, 2011 <br /> Stability Re-evaluation: Squaw Gulch Valley Leach Facility technical memorandum dated <br /> January 28, 2014 <br /> Non agglomerated Tailings Strength Assessment and Stability Evaluation — Rev 2 technical <br /> memorandum dated June 1, 2017 <br /> 2.0 ORE PLACEMENT GUIDELINES <br /> The following guidelines are applicable for ore placement within the VLF2 area. <br /> y The lift may consist of crushed ore, run-of-mine material (ROM), and tailings. <br /> Placing ROM doesn't pose any geotechnical risk to the pad and is preferred over crushed rock <br /> because of its higher shear strength and is an acceptable industry practice. Placing ROM has <br /> been in practice at CC&V since 1996 and included in Technical Revision 37. Since CC&V also <br />