2014-10-31_PERMIT FILE - C1981044A

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10.000 Ton Storage Silo. The 10,000 ton Storage Silo provides storage for enough product coal to load a unit train and configured with a loading chute to allow flood - loading of railroad cars. The silo installation includes a rail car deicing system. As an important part of the coal handling system, MCM has completed a stability analysis for the storage silo area to verify that nearby underground mining would not adversely affect the stability of this critical structure. Laboratory - The laboratory facilities, consisting of a laboratory trailer and sample storage shed, were located behind and north of the Mine Shop/Warehouse. The laboratory facility, operated by an independent testing organization, was used to analyze the coal product for quality control. During temporary cessation, the independent testing organization moved their operation to another mine. In 2010, the laboratory facilities were demolished, and the resulting demolition debris was placed in the permitted solid -waste landfill near the No. 9 Mine Portal Area. Railroad Spur - The railroad spur was constructed in 1978 from the D &RGW Railroad (now Union Pacific Railroad) to enable unit trains to load coal from the coal silo, located in the facilities area. The railroad spur includes a track - scale and scale - house. The rail spur remains in- place, is usable, and stabilization work was completed in 2011 on the railroad bridge over the Williams Fork River to address erosion from high water during 2010. Electrical Substations and Powerlines — Four substations, and a network of distribution lines have been used to provide power to the various mine facilities over the years. The No. 5 Mine substation was removed and the associated disturbance area reclaimed during reclamation of the No. 5 Mine portal area in 1996 -1998. The other substations remain, and would be available to support any future operations. No. 5 and 5A Mine Fresh Water Systems The No. 5 and 5A Mine Fresh Water Systems are not currently in use, although both wells and water treatment systems remain in place, and could be reactivated in the future. During active operations, fresh water was supplied from underground sumps in the No. 5 Mine. Two underground pumping stations were used to maintain pressure and flow throughout the mine, and a 100,000 gallon storage tank was installed near the No. 5A/6 Portals. To establish and maintain a more reliable supply and pumping system, especially in the event of an underground emergency, plans were developed to change to a system with surface pumps and storage. The water source would be the No. 5 Mine Dewatering Ponds. Pressure pumps would be placed at the ponds, and water would be pumped into the No. 5 and No. 6 mines via a pipeline that enters the mines through a converted power borehole near the silo. Mine Water Handling System - The Mine Water Handling System has been designed to handle all water pumped from the No. 5 and No. 6 Mines, as described in the following sections, and provides for detention of the mine discharge to allow any suspended solids to settle out before the water is discharged to the Williams Fork River. It was originally planned to drill two boreholes (approximately 20 inches in diameter) from the hillside adjacent to the current pond location into a low area of the mined -out section of the No. 5 Mine. Due, however, to the amount of water encountered in one of the boreholes (approximately 400gpm), this location was abandoned. The borehole, which encountered water, is now being used as a ground water monitoring well for the Middle Sandstone. The other borehole has been sealed. The new borehole locations, selected and approved by the MLRD in November, 1982, are located in the Williams Fork River Valley. The Mine Water Handling System consists of the following major components: • No. 5 Mine Sumps • Boreholes and Overland Pipes • Chemical Treatment System (possible future option) • Settling Ponds • Discharge Ditches with Measuring Flumes TR14 -36 2.05 -11 Revised 09/08/14