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Wolf Creels Reserve mine workings and the overlying accumulations of water in the sealed and abandoned Wadge <br />Seam workings to be transferred to the existing 6 -Main North (6MN) Reservoir, the existing 10 -Right water <br />pipeline, or the planned future passive mine water treatment system. It should be noted that the puinp(s) for the <br />Wolf Creek dewatering system will be installed and located underground in the mine workings, so no surface <br />pumping installation or power will be required. <br />In order to identify and prevent or minimize any potential environmental impacts associated with the proposed <br />water transfer activities, TC reviewed the most recent grouse Ick mapping, consulted with the CPW, and contracted <br />a supplemental cultural resource survey for those areas not covered by previous survey work. These environmental <br />analysis activities are documented by the cultural resource survey report, provided in Exhibit 6T, and wildlife <br />consultation letter, included in Exhibit 23C. <br />The main SMN Pipeline will connect to the 5MN Borehole riser, and extend approximately 3,200 feet to the west. <br />Three "T's" and associated valving from this pipeline will allow routing of flows to the existing l ORT Pipeline, the <br />existing fiMN Reservoir, and the planned future passive mine water treatment system, as shown on Figure 1. The <br />first lateral line will run approximately 620 feet from the main pipeline to the 6MN Pumphouse, and then extend <br />another 500 feet to a "T' connection on the l ORT Pipeline. The second lateral line will extend approximately 190 <br />feet to the inlet of the 6N/IN Reservoir. The third lateral line will be installed at some future date, and will be <br />designed to tie-in to the planned passive water treatment system. All piping will be 10 -inch thermally fused High - <br />Density Polyethylene (HDPE) pipe, and will be buried a minimum of 5 -feet deep so that it is below the normal <br />frost -line. 10 -foot diameter CMP access risers will be installed at the 5MN Borehole and the four other pipeline <br />junctions to protect the associated valves, and provide inspection/inaintenance access. <br />Installation of the SMN Pipelines and access risers will involve placement of construction erosion controls (silt <br />fence and/or straw wattles), removal and windrowing of soil materials; excavation, placement, and backfilling <br />around the risers; trenching in most areas for pipeline placement; placement of suitable bedding materials; <br />placement, connection, and pressure testing of the pipelines; backfilling and compaction of suitable fill materials <br />around and over the pipeline; backfilling and compaction of the trench; regrading; replacement of soil materials; <br />and revegetation of all disturbed areas. Maximum width of the pipeline corridor will be 40 feet. It is not <br />anticipated that any of the planned activities will occur within stream buffer zones. <br />The 5MN Borehole installation will remain in-place until it is no longer needed to support ongoing or anticipated <br />future mining operations. While the associated pipeline disturbance areas will essentially be reclaimed within a <br />reasonable time period following pipeline installation, TC does not consider these areas to be reclaimed for <br />purposes of reporting„ since there is some potential that they may be re -disturbed for pipeline repair or maintenance <br />in the future. <br />At the time of final reclamation, the 5MN installation will be reclaimed by plugging and sealing the borehole, <br />consistent with State Engineer requirements; c:uiting-off the borehole casing below grade, regrading the pad and <br />road to their approximate original configuration, soil material replacement, and reseeding with TC's standard <br />Rangeland Seed Mix Soil. For the pipeline installations, the access risers will be removed or demolished to 3 -feet <br />below grade, and the pipelines will be cut-off below grade, capped, and abandoned in place. At that time the <br />disturbance associated with the access risers will be regraded, soil materials replaced, and these areas as well as any <br />pipeline areas requiring maintenance will be reseeded. Reseeding of the disturbed areas will be completed during <br />the first appropriate planting period following soil material replacement. <br />MR15-288 2.05-45.27 10/09/15 <br />