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AMR estimates the date of commencement to be July 1, 2019 but will not proceed until the Division <br /> approves this permit application. Duration of operations are dependent on exploratory findings,but for the <br /> purposes of this application operations are assumed to be complete by December 31,2040. This timeframe <br /> assumes at least 20 years of operations, followed by an 18-month period for reclamation. <br /> Operations are anticipated to occur seasonally while CR20A is accessible with rubber-tired vehicles. <br /> Periodically during winter,over-snow vehicles will be used as needed to access the site in winter to provide <br /> minimal maintenance and site security. <br /> The initial season of work in 2019 will include 1-2 individuals to complete the construction of the portal, <br /> begin driving the drift and complete the grading of the laydown area. Workers will commute to the site <br /> daily until the completion of the boarding house at some point in future years. As operations expand in the <br /> coming years, it is anticipated that up to 6 individuals may be working at the site. <br /> Equipment and Materials <br /> Mechanized equipment will be used throughout the duration of the proposed operations. A detailed <br /> equipment list is provided in Attachment C5. Both drill/blast and rock hammer techniques will be used to <br /> complete the excavation of the drift and shaft. <br /> Fluids and chemicals stored on site will consist of explosives,diesel fuel,gasoline,miscellaneous hydraulic <br /> fluids and antifreeze. Powder and cap magazines will be stored on the surface in Bureau of Alcohol <br /> Tobacco and Firearms(ATF)approved magazines until an underground magazine in compliance with Mine <br /> Safety and Health Administration (MSHA) regulations can be constructed in the drift. Diesel fuel and <br /> gasoline will be stored in mobile fuel tanks in the bed of pickup trucks as well as 500-to 1,000-gallon fuel <br /> tanks with built in secondary containment. Motor oil, diesel exhaust fluid (DEF), hydraulic fluids, <br /> antifreeze and drilling fluids will be stored in manufactures' containers that collectively will be stored in <br /> large tanks housed in a cargo-container to capture small leaks and spills. At any one time,as much as 2,000 <br /> gallons of diesel and 1,000 gallons of gasoline could be on site from cumulative storage in fuel tanks and <br /> equipment. At all times during operations, diesel absorbent socks and pads will be on site for emergency <br /> use in the event of spills. <br /> To manage human waste, portable composting toilets will be used in both affected areas. <br /> Water will be hauled on site as needed for drilling and domestic needs to support the proposed operation. <br /> It will be stored in a variety of 500-gallon trailer mounted tanks and 5,000-gallon cisterns stored in both <br /> affected areas. <br /> Protection of Surface Water Resources <br /> All aspects of the proposed operation are located and designed to prevent impacts to surface water <br /> resources. The location of the affected areas are far and away from Corkscrew Gulch. At all times,erosion <br /> control best practices will be utilized and maintained along the road and cut/fill slopes to prevent <br /> uncontrolled releases of sediment and stormwater from the affected areas. Best practices will include <br /> placing berms and ditches along the perimeters of pads, slopes and roads with periodic check dams and <br /> baffled spillways to collect sediment and prevent erosion. Furthermore, disturbed areas with topsoil will <br /> be seeded upon completion of construction, as further described in Exhibit D. To ensure the control of <br /> stormwater, a General Construction Stormwater Permit (COR-040000) along with a Stormwater <br /> Management Plan (SWMP) will be submitted to the Colorado Department of Public Health and <br /> Environmental(CDPHE)prior to beginning operations. <br /> Page 3 of 4 <br />