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Section 2.05.3(3) <br /> Mine Facilities <br /> Introduction <br /> This section contains a description of the proposed structures to be used in connection with or to <br /> facilitate the surface coal mining and reclamation activities at the New Horizon North(NHN) <br /> Mine area described in Section 2.05.3, Operation Plan: Permit Area. <br /> Support Facilities <br /> Buildings. Proposed buildings include a 60'x90' steel building structure to be used as a shop, a <br /> 24'x70' mobile building to be used as the mine office, a 20'x40' mobile building to be used as a <br /> bath house, a 14'x40' mobile building to be used as a foreman's office, a 24'x70' steel building <br /> for use as a warehouse and hose room, three 8'x20' steel cargo containers to be used for <br /> warehousing and parts storage, and a fuel and lube oil storage and pump facility consisting of <br /> storage vessels contained inside a lined earthen berm that will contain the volume from the <br /> largest vessel plus the I Oyr-24hr rainfall event. all located at the NHN Mine facilities area. Map <br /> 2.05.3(3)-1 Facilities Map shows the locations of the buildings. <br /> Details of sizes and types of construction for all buildings are shown in Table 2.05.3(3)-1. <br /> Waste Water. Sewage from the proposed buildings will be disposed of through proposed septic <br /> sewage disposal system. Waste water from the equipment wash will be re-circulated and reused; <br /> however, if there is any excess waste water, it will be run through a sediment trap and an oil <br /> water separator and discharged to Pond NHN-001 via a natural drainage and the NHN-001 East <br /> Ditch. <br /> Dewatering System. Appendix 2.05.6(3)-4 contains State Engineer approved permits for three <br /> dewatering wells adjacent to the initial boxcut excavation in the backfill. The wells are 85ft., 65 <br /> ft. and 85 ft. deep respectively. The dewatering system holes are initially drilled with a 6-3/4" <br /> tri-cone bit then air lift tested to determine if enough water is present to warrant installing a <br /> pump. If sufficient water is present the hole is reamed with an 8-3/4"tri-cone bit and cased with <br /> Schedule 40 PVC pipe. The bottom 20' screen section of the casing is mill slotted 6" PVC. The <br /> entire hole is gravel packed and a pump is installed, and the top 10' of the hole is filled with <br /> Sakrete. Electricity for the pump or pumps is provided by a portable generator. These wells are <br /> temporary. The holes will be reclaimed after they have served their purpose, the pumps <br /> removed,the holes filled with granular bentonite to within 10 feet of surface, concreted 10' to <br /> the surface, and reclaimed in cycle with the surface reclamation of the pit. <br /> Section 2.05.3(3) Page 1 July 2013 (MR 07) <br /> MR_dT <br /> ,W(Vved <br />