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Review of Blasting Operations at Denver Brick Company's Golden Mine <br /> IMPACTS OF BLASTING OPERATIONS AND RECOMMENDED PRACTICES AND <br /> CONTROLS FOR DENVER BRICK COMPANY'S GOLDEN MINE OPERATION <br /> SUMMARY OF GENERAL FINDINGS AND CONCLUSIONS <br /> This report includes the Stanto Group team's findings and recommendations regarding the <br /> overall impacts of the proposed blasting parameters and excavating work at Golden Mine, North <br /> of Golden, Colorado. Conclusions and other specific aspects of the blasting and mining <br /> operation work are included in the body of the main report. The report will go into the Stanto <br /> Group Inc team's recommended blasting controls designed to minimize the effects of blasting in <br /> the mine to the surrounding neighbors and adjacent property. <br /> 1. If blasting is performed within the property limits proposed in this report, it is highly <br /> unlikely that blasting will damage any nearby property or bother or cause injury to <br /> neighboring households or people. For the proposed blasting and separation distances, <br /> the intensity of the blast-induced ground motion will not approach the threshold levels <br /> that could be damaging to structures or water wells. Stanto Group Inc has been directly <br /> involved in many projects where rock blasting was performed without incidents, despite <br /> the existence of much greater technical and operational challenges than those <br /> presented at the Golden Mine. In conclusion, Stanto Group Inc is confident that the <br /> proposed blasting can be performed without incident. <br /> 2. Stanto Group Inc has found no evidence indicating or suggesting that blasting will have <br /> any significant long-term impacts on the land that will be mined within the permitted <br /> mining area of the Golden Mine. Impacts like blast noise and vibration would exist only <br /> temporarily during each blast and they are not expected to cause any lasting damage. <br /> To conclude, no known geologic structures or faults are connected or intersect the <br /> aquifers feeding nearby wells, thus blasting activity will have no impact on area <br /> groundwater. <br /> 3 <br />