2015-09-03_PERMIT FILE - C2010089 (7)

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overburden removal fleet. The stockpile will always be located in an area with controlled drainage to a permitted discharge outfall. Stockpile parameters will rarely exceed 10,000 tons or thirty days in duration and the location will change depending on the rate of pit migration. The estimated coal tonnage, overburden and parting volumes to be extracted for all mining areas are presented on Table 2.05.3-2. The coal quantities required from the NHN Mine under Western Fuels -Colorado's contract to supply Tri-State Generating and Transmission Associations' Nucla Station are estimated to be from 250,000 to 460,000 tons per year. Whenever possible, overburden stripping and coal loading will be sequenced to maintain an in -pit inventory of approximately one month's coal requirements. Additionally, overburden stripping and coal loading will be sequenced to allow blending of coal in the pit to enable delivery of relatively uniform quality coal to the power plant. The CC Ditch Company's Second Park Lateral Ditch is scheduled to be temporarily diverted into a large HPDE pipeline to facilitate mining that area of the permit where the current ditch crosses. Del -Mont Consultants of Montrose is preparing the design for this pipeline diversion. Design details are located in Appendix 2.05.3(3)-4. The Timing of Operations table, Table 2.05.3-3, at the end of this section describes the sequence in more detail. The approved Montrose County Special Use Permit is shown in Appendix 2.05.3-1. The pipeline is of thick high density polypropylene (HDPE) and was designed to handle the full ditch flow currently carried in the ditch. WFC is working with the CCC Ditch Company and Del - Mont Consultants to ensure that the design will satisfy CCC Ditch Company needs and that the Company will be provided a long term supply of water that is equal or better than their current supply. The plan also ensures that no downstream user will be interrupted at any time, since the work will be conducted in between irrigation seasons. Ponds, other treatment facilities and diversions are discussed in Section 2.05.3(4). Utility relocations are discussed in Section 2.05.03(3). 2.05.3(3) Mine Facilities Please see a separate section devoted for 2.05.3(3) Mine Facilities 2.05.3(4) Ponds, Impoundments, Other Treatment Facilities and Diversions Please see a separate section devoted for 2.05.3(4) Ponds, Impoundments, Other Treatment Facilities and Diversions Section 2.05.3 Page 3 August 2015 (MR -15)