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6.5 Geotechnical Stability Exhibit <br /> Explosives will be used in conjunction with the mining operation. <br /> Guidelines from the Coal Program <br /> If blasting is conducted in accordance with the following equation, the peak particle <br /> velocity shall be deemed to be within the limit. The maximum weight of explosives to be <br /> detonated within any 8-millisecond period may be determined by the formula W= (D/Ds)2 <br /> where W=the maximum weight of explosives, in pounds, that can be detonated in any 8- <br /> millisecond period ; D=the distance, in feet, from the blast to the nearest dwelling, <br /> school, church, or community or institutional building; and Ds=the scaled-distance factor <br /> of 55. <br /> There are no structures of any type within 2,000 feet of the Quarry. Therefore,the blasts <br /> will not detonate over 1,322 pounds of explosive within any 8-millisecond period. <br /> Electricity will be supplied by Holy Cross to the Yard site.None of Holy <br /> Cross's equipment will be on the Yard footprint except basic hook up to <br /> a distribution panel. <br /> G4. <br /> '� 3799 HIGHWAY 82•P.O.BOX 2150 <br /> 0 <br /> CIENWOOD SPR/NIS.COLORADO 81602 <br /> 19761 945-5491-FAX(970)945-4081 <br /> FtY <br /> WO <br /> 12/7/2023 <br /> Defiance Stone,LLC <br /> RE Dotsero-Trail Gulch <br /> Dear Robert <br /> The above mentioned development is within the certified service area of Holy Cross Energy. <br /> Holy Cross Energy has adequate power supply to provide electric power to the development,subject to tanffs, <br /> rules and regulations on file Any power line enlargements,relocations,and new extensions necessary to deliver <br /> adequate power to and within the development will be undertaken by Holy Crass Energy upon completion of <br /> appropriate contractual agreements and subject to necessary governmental approvals. <br /> Additionally,due to current economic conditions,Holy Cross Energy is not stocking the quantity of construction <br /> materials as in past years. If your project is slated for construction this year,please advise us as soon as <br /> possible. You will need to enter into agreements with Holy Cross Energy,and pay for the project,sufficiently in <br /> advance of construction to avoid passible delays while matenals are procured. The currently estimated lead time <br /> for procurement of materials is around 12 weeks. <br /> Pleaseadvise when you wish to proceed with the development of the electric system for this project. <br /> Sincerely, <br /> HOLY CROSS ENERGY <br /> Johnathan Clemmer <br /> //?&L. <br /> FST <br /> Engineer I <br /> jc lem menPho lycross.com <br /> (970)393.5241 <br />