2013-05-10_REVISION - M1977193 (3)

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3 (b) earthmoving; After blasting, rock will be pushed over the highwall face with a bulldozer or carried and dumped over the face utilizing a front -end loader. Rock is then picked up at the large muckpile developed along the base of the highwall and fed via front end loader into the crushing and screening system located at the pit floor elevation 5660'. Material will be conveyed to various sized aggregate material stockpiles located at the pit floor /truck loadout area. No soils exist on the surface for removal prior to mining, and no waste is encountered during mining operations. However, fines materials (- 3/4 ") may be stored on site and used for planting medium during final reclamation. Process and Load out Operations Rock crushing, screening, sizing, and stockpiling circuits will not change to any significant degree over time from the present configuration, although the plant may be moved to closer proximity to the toe of the highwall system as well as relocated at a lower final elevation, projected to be approximately 5550' at lowest pit elevation. This plant will continue to be fed for the most part by Front End Loader muck - and -carry from the muckpile created along the toe of the highwall by blasting and push off, or, alternatively, trucks may be loaded at the muckpile for direct dumping into the crusher feeder. Mining operations including drilling, blasting, crushing, and truck loading are normally scheduled for 5AM to 9PM six days per week. A continuance of this schedule for Saturday operation may be possible should business conditions warrant. (c) all water diversions and impoundments; and Stormwater Controls As part of the 1997 amendment conditions, the site was reconfigured to direct storm - related surface runoff areas above and west of the mine site from its former southerly flow path towards Tunnel Drive and the Arkansas River. The reconfigured flow path conveys the surface flows across the pit floor, along the base of the highwall north and east towards a series of storm water detention ponds constructed along the eastern portions of the permit boundary. These storm water control structures have been in place since late 1997 and have successfully operated to keep surface runoff directed away from residential areas along Tunnel Drive as well as the Canon City Hydraulic Ditch paralleling the Union Pacific railroad tracks running along the north bank of the Arkansas River. The detention ponds will be maintained as is to handle storm flows that may enter the pit floor area as well as surface runoff delivered from undisturbed terrain west and above the mining site. Drainage patterns along the base of highwall system and product stockpile area must be maintained to allow storm- derived surface flows to cross the pit floor unimpeded towards the storm flow channel excavated at the northeast corner of the mine site which feeds the detention ponds. These structures will be maintained and kept operational through the life of mine. This amended acreage and increased life of mine will not necessitate change to the stormwater control system as it currently operates at this site (d) the size of area(s) to be worked at any one time.