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Mrs. Margaret Winter <br /> February 11,. 1982 <br /> Page Two <br /> expense. The monitoring site is to be located immediately <br /> behind the property known as 1230 Chambers Drive. The moni- <br /> toring procedure is to be as proposed on page 4 of the <br /> December 2, 1981 letter from Charles M. Salter Associates. <br /> Additional monitoring as spot checks and also in response to <br /> any complaints will be done by county staff with the assistance <br /> of qualified city of Boulder or Boulder County personnel . <br /> Initial scraping operations for the removal of topsoil or <br /> overburden in a new mining area will be exempt from the noise <br /> level standard (but not any federal , state or local standard <br /> which would otherwise be applicable) , subject to the condition <br /> that the applicants conduct the operations as efficiently <br /> as possible to minimize the lengths of time that these operations <br /> are being conducted. <br /> 3) Staff will coordinate with the applicant on the design and <br /> placement of the processing plant and stockpiles in order <br /> to assure that noise impacts are minimized. <br /> 4) Initial mining of any stage should be done during the winter <br /> months when windows are usually closed and residential outdoor <br /> activity is minimal so as to reduce the noise impacts of <br /> initial mining when working levels are at the surface and <br /> overburden stockpiles are not in place. <br /> 5) The use of haul trucks in the actual mine pit areas is subject <br /> to additional formal review if noise levels prove to be <br /> excessive. Review would be for consideration of quieter <br /> methods of transporting pit run to the processing area, <br /> including the possible use of conveyor belts. <br /> 6) The north haul road shall be relocated to the easternmost <br /> portion of the property immediately inside the flood control <br /> dike. The haul road location should be mined initially, <br /> resulting in a permanent haul road location with an elevation <br /> lower than adjacent elevations so as to provide lower visual , <br /> noise and dust impacts. <br /> 7) The south haul road shall be eliminated due to excessively <br /> adverse impacts on the mobile home park. More acceptable <br /> alternate south haul routes or mitigation measures proposals <br /> from the applicant may be considered through additional <br /> formal review as an amendment to the Special Use. <br /> 8) Maximum vehicle speeds on site shall be limited to twenty <br /> (20) miles per hour. <br /> 9) The northern haul road alignment shall be designed to maximize <br /> curve radii and thus minimize acceleration and deceleration <br /> of trucks on the haul road. <br /> 10) Dynamic engine braking devices shall not be used on the site <br /> except in emergencies. This applies especially to the stop <br /> sign at the intersection with Table Mesa Drive. <br /> 11) Only the applicant's (Flatiron) trucks will be allowed in the <br /> open mine pit areas, with all other trucks restricted to the <br /> main haul road and the operation area. In order to haul <br /> from the site, all trucks must comply with CRS 1973, 24-12-106 <br /> regarding maximum allowable noise levels. The applicant will <br /> be held responsible for the actions of all drivers and <br /> speed limits , truck maintenance standards and the prohibition <br />