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iiiiiiiiiiiiiiiihi <br />999 <br />January 10, 2000 <br />To: Cheryl Linden, AG's Office <br />From: James Dillie <br />Re: Additional Concerns from Local Citizens, Cresson Project, M-80-244 <br />Attached is a recent letter, and attachments, from the Morrison's in Victor, Colorado. As noted, <br />they are concerned about the blasting operations being conducted by CC&VG at the Cresson <br />mine site. This is a continuation of the Morrison's letter of concern I sent you in December, <br />1999. <br />The Morrison's summary of mine blasts outline the same thing I found during my December 9, <br />1999 inspection; the mine has not exceeded the maximum allowed peak particle velocity (PPV) <br />during any blasting event. The approved maximum allowed PPV for the Cresson Project is 0.50 <br />inches per second (ips). The maximum PPV registered at the Morrison's building, pursuant to <br />their own records, was 0.034 ips. <br />The Morrison's have included an AP news article, dated January 27, 1999, which stated that <br />"Within the next 60 days, the company must do an analysis of its blasting at the mine to <br />determine whether anything needs to be done to prevent damage to historic buildings in nearby <br />Victor." This was a requirement by the Board. The study was completed March 24, 1999 and <br />accepted by the Division in April, 1999. Jim Pendleton and I agreed that CC&VG adequately <br />demonstrated through appropriate blasting, vibration, geotechnical and swctural engineering <br />analyses that off-site areas (including the historic (old) buildings in Victor) would not be <br />adversely affected by blasting as long as the operator did not exceed 0.50 inches per second peak <br />particle velocity during blasting events. <br />I suppose you can include a response to this letter when you respond to the previous letter of <br />concern. <br />Please copy Berhan Keffelew, Bruce Humphries and me on all your correspondence. <br />Thanks <br />