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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 l0yr -24hr rainfall event. all located at the NI-IN 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 />