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2801 Youngfield Street, Suite 171 <br /> Golden, CO 80401 <br /> 303-456-5638 <br /> Toll Free 888-456-5638 <br /> Fax 303-456-5639 <br /> www.mathesonmining.com <br /> <br /> <br />November 3, 2015 <br /> <br />Mr. Gary Horton <br />Cripple Creek & Victor Gold <br />Newmont Mining Corporation <br />P. O. Box 191 <br />Victor, CO 80860 <br /> <br /> <br />Re: Review of Blasting Studies at CC&V <br /> <br />Dear Mr. Horton: <br /> <br />Matheson Mining Consultants, Inc. (MMC) has reviewed the seven Ground Motion Attenuation <br />Studies that Vibra-Tech Engineers, Inc. and Matheson Mining Consultants, Inc. have performed <br />since 1997 for Cripple Creek and Victor Gold Mining Company to assess the potential impacts <br />to ground motion from the proposed underground exploration and mining that will be added as <br />part of Amendment 11. Each of these studies was measurement of surface blasting in varying <br />locations on the property. Below is a Table with the results of the seven studies. <br /> <br />Date Location H Beta R squared <br />6/13/97 Ajax 261 -1.62 0.889 <br />6/13/97 Ridge Road 286 -1.80 0.921 <br />11/26/97 Leach Pad 11 -1.19 0.704 <br />2/25/00 N. Cresson 168.6 -1.54 0.913 <br />3/5/04 E. Cresson 313.3 -1.825 0.894 <br />3/5/04 E. Cresson 19.89 -1.059 0.804 <br />3/5/04 E. Cresson 21.89 -1.096 0.788 <br /> <br /> <br />Each of the above fits to the formula: <br /> <br />PPV H SD B=−() <br /> Where, H = the velocity (y axis intercept) at a scaled distance of one, <br /> B = the slope of the curve, <br /> PPV = the peak particle velocity in inches per second, and <br />SD = scaled distance = distance (feet) from shot to recorder <br />divided by the square root of the charge weight (pounds) <br /> <br />The program also yields the correlation coefficient (goodness of fit), 1.0 is perfect.