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/ITom & Gay Hatcher <br />4450 Monitor Rock Lane <br />Colorado Springs, CO 80904 <br />3 September 2013 <br />State of Colorado <br />Division of Reclamation, Mining and Safety <br />Department of Natural Resources <br />ATTN: Mr. Tom Kaldenbach <br />1313 Sherman St, Room 215 <br />Denver, Colorado 80203 <br />Ref: a. Your Letter dated 19 August 2013 (attached) <br />b. Snyder Quarry, Permit No. M- 1977 -210 <br />Dear Mr. Kaldenbach, <br />RECEIVED <br />'EP 092013 <br />Division of R <br />Mining & saftty <br />a. Purpose: The purpose of this letter is to request you significantly lower the permitted <br />blasting values for the Snyder Quarry. <br />b. Situation: I understand you have numerous documentation items detailing the effects <br />Snyder Quarry blasting has had on surrounding properties. As such, we request you change the <br />blasting standards because of the impact these blasts are having on neighboring properties. <br />Specifically, we do not believe Rule 6.5(4) is being complied with. <br />(1). As you know, the current permitted Snyder Quarry blasting limits are: <br />- 1.0 inch /second for Peak Particle Velocity <br />- 133db for Air Blast <br />(2). On 5 Jun 2012, we had a blasting event that shook our neighborhood knocking pictures off <br />walls and damaging windows. From your test equipment readings, that blast was: <br />- 0.11 inch /second for Peak Particle Velocity <br />- 58.6db for Air Blast <br />(3). Recommend you consider the permitted Snyder Quarry blasting limits be revised at a <br />minimum to: <br />- 0.05 inch /second for Peak Particle Velocity <br />- 30db for Air Blast <br />c. Request: 1. Please re- evaluate (and significantly lower) the <br />permitted value for Peak Particle Velocity for the Snyder Quarry. <br />2. Please re- evaluate (and significantly lower) the <br />permitted value for Air Blast for the Snyder Quarry. <br />Thank you, <br />Tom Hatcher <br />