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Exhibit D CMLRB 112 Permit Application <br />Agile Stone Systems, Inc. <br />• between the rock units outcropping on either side of these fault zones does not imply <br />structural instability. (Azurite, Inc., 11/97). This area of the State is rated at a 0.15 <br />seismic earthquake potential which means the project azea has a relatively low level of <br />seismic history. Vibration studies performed for Agile by Vibra-Tech Engineers, Inc. at <br />this site involved the induction of ground vibration by a confined explosive charge in the <br />granite quarry azea. The results of the study demonstrated extremely low levels of <br />vibration energy being transmitted through bedrock. The vibrations generated were much <br />less than the vibrations experienced due to nearby historical sources such as train traffic. <br />The likelihood of blasting vibrations inducing reactivation of historical fault zones in this <br />area is highly improbable. (Azurite, Inc., 11/97) <br />One neighboring land owner, Clazk at 4,300' distance to the project, expressed concern <br />that mining operations may dislodge rock from nearby natural highwall areas resulting in <br />rock falls which may damage his home. The applicant engaged Azurite, Inc. (October, <br />1997) to investigate the site. The highwall, 4,000' from the quarry, is composed of tilted <br />beds of Dakota Group sediments, limestones, sandstones, and shales. Natural weathering <br />and highwall wasting is evident along the vertical face areas to some degree. The site <br />inspection noted that there was no evidence of lateral movement of any rock more than a <br />few yazds away from the highwall face. The Clazk's residence is located a minimum of <br />] 50 feet from the highwall faces. I[ is unlikely that a rock fall, natural or induced, would <br />then cause the rock to move the 150' distance to the Clazk's residence. <br />• As an additional check, a seismograph was placed at the Clark residence during the <br />vibration blast test work. It was not able to pick up the minimum particle wave (0.03 <br />in/sec) necessary for the seismograph to record any ground vibration level. Also, the <br />Clark residence is next to the Union Pacific Railroad which has been moving 30 large <br />unit trains daily for over 100 years. Since the railroad ground vibration did not impact <br />these natural highwalls, it is considered supporting evidence that blasting at the quarry <br />4,000' away will also not impact these natural highwalls. <br /> <br />7 <br />