1989-01-12_REVISION - M1981302 - Laserfiche WebLink

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Mr. Richard Meyers SU-88-14 January 12, 1989 Page 2 in a new mining area will be exempt from the noise level standard (but not any federal, state or local standard which would otherwise be applicable) , subject to the condition that the applicants conduct the operations as efficiently as possible to minimize the lengths of time that these operations are being conducted. 3) Staff will coordinate with the applicant on the design and placement of the processing plant and stockpiles in order to assure that noise impacts are minimized. 4) Initial mining of any stage should be done during the winter months when windows are usually closed and residential outdoor activity is minimal so as to reduce the noise impacts of initial mining when working levels are at the surface and overburden stockpiles are not in place. 5) The use of haul trucks in the actual mine pit areas is subject to additional formal review if noise levels prove to be excessive. Review would be for consideration of quieter methods of transporting pit run to the processing area, . including the possible use of conveyor belts. 6) The south haul road shall be eliminated due to excessively adverse impacts on the mobile home park. More acceptable alternate south haul routes or mitigation measures proposals from the applicant may be considered through additional formal review as an amendment to the Special Use. 7) Maximum vehicle speeds on site shall be limited to twenty (20) miles per hour. 8) Dynamic engine braking devices shall not be used on the site except in emergencies. This applies especially to the stop sign at the intersection with Table Mesa Drive. 9) Only the applicant's (Flatiron) trucks will be allowed in the open mine pit areas, with all other trucks restricted to the main haul road and the operation area. In order to haul from the site, all trucks must comply with CRS 1973, 24-12-106 regarding maximum allowable noise levels. The applicant will be held responsible for the actions of all drivers and speed limits, truck maintenance standards and the prohibition of the use of dynamic engineer braking devices shall be posted on the site. 10) An acceptable alternative to back-up horns must be implemented on the site. The strobe light warning system currently used or an ultra-sonic or microwave sensing unit now sanctioned by the Federal Mine Safety and Health Administration are acceptable alternatives. 11 ) The maximum standard for dust levels at residential property lines shall be 10% opacity for no more than 30 seconds. Exceeding this standard shall constitute a violation of the Special Use approval.