development or for subsequent access to these sites, TCC retained the flexibility to windrow topsoil from the access
<br />routes, as appropriate, to assure protection of the topsoil resource.
<br />• Surface disturbance for each site is minimal and consists of an area encompassing approximately 100 x
<br />Topsoil from the drill -pad and mud -pit areas was salvaged and stockpiled adjacent to each drill -site. Appro
<br />26 inches of the Binco silty clay loam was salvaged, based upon the existing soils mapping for each site. Following
<br />topsoil salvage, each drill -site was leveled and mud pits developed. Site drainage was configured to contain surface
<br />runoff from the site within the mud -pit areas. Secondary sediment control measures consisting of silt fences or hay
<br />bales were utilized as necessary to minimize sediment transport from each site. For both the shaft and borehole, the
<br />shaft collar and casing extend above ground elevation. Protective shelters /covers of wood frame and/or metal
<br />construction were constructed on concrete foundations over the shaft and borehole casing. Following completion of
<br />drilling activities, the mud pits at each site, once suitably dry, were backfilled. The sites were regraded, topsoil
<br />redistributed, and the areas seeded with the appropriate seed mix at the first appropriate seeding opportunity.
<br />Given that the Barricade Chamber is no longer needed for mine safety purposes (function is now addressed by mine
<br />escapeway plans utilizing fresh -air returns and escape elevators), the Barricade Chamber and associated shaft have
<br />been sealed, with bulkheads at the top and bottom of the shaft, are now used for mine water storage, and the protective
<br />shelters have been demolished, with the foundations remaining in- place. The shaft collar and borehole casings are
<br />now covered by locked steel caps, as a security and safety measure. Existing mine water transfer pipelines connect to
<br />the Barricade Chamber/FCM -2 boreholes from the Fish Creek Water Treatment Facility and l ORT Dewatering Wells,
<br />allowing water to be transferred from these locations to the mine water system. An additional transfer pipeline,
<br />approximately 8,560 feet long, will be extended from the Barricade Chamber/FCM -2 boreholes to the new Fish
<br />Creek/Area 1 Pit Transfer Pipeline, to allow water to be transferred directly from this location to the Area 1 Pit Mine
<br />Water Storage Reservoir. The pipeline will be laid in existing pipeline and road corridors to minimize new
<br />disturbance, and will be welded 12 -inch HDPE pipe, buried approximately 5 feet deep, connecting to the Fish
<br />Creek/Area 1 Pit Transfer Pipeline at a CMP or concrete culvert manhole enclosing the pipeline control valves. For
<br />• all pipeline construction, soil material will be removed and temporarily windrowed on one side of the trench, with
<br />trenched material placed to the other side. Once the pipeline is placed, properly bedded, connected, and leak tested,
<br />trenched material will be backfilled and compacted, and soil material will be replaced over the excavation and
<br />reseeded.
<br />When the Barricade Charnber/FCM -2 facilities are no longer needed to support ongoing or future mining operations,
<br />the shaft and borehole will be plugged and sealed, the shaft collar and borehole casing will be demolished or cut -off a
<br />minimum of three feet below the ground surface, the hole locations will be marked, remaining foundations will be
<br />removed, and the disturbed areas will be regraded to blend with the surrounding terrain, stockpiled topsoil will be
<br />replaced, and the areas will be reseeded. It is anticipated that when the pipeline is no longer needed to support
<br />mining and related operations, it will be plugged below grade and abandoned in- place.
<br />TORT Dewatering Wells (Eastern Mining District)
<br />The IORT dewatering system (original) consists of two primary components: 1) Dewatering wells and control
<br />building (existing), and 2) Treatment facility (future). The initial dewatering well was drilled to connect into the
<br />sump developed off the 10 -Right entry. Please refer to Map 23, Mine Plan, for the location of s
<br />the ump. A light -
<br />duty road was constructed to the site, beginning at the proposed treatment facility and terminating at the borehole.
<br />The beginning 1,600 feet of this road required new construction, while the remainder of the road involved
<br />upgrading an existing ranch road. The location of the access road is shown on Maps 17 and 18. As shown on the
<br />maps, the overall road length is approximately 4,600 feet. This location of the initial 1,600 feet of the road differs
<br />slightly from the original proposal to improve visibility and safety at the road entrance.
<br />During construction of the road, approximately 6,815 Cy of topsoil was windrowed to the side of the road. This
<br />• volume is based on constructing a road 4,600 feet long, 20 feet wide and salvaging topsoil to a depth of 24 inches.
<br />The topsoil was stockpiled adjacent to or windrowed to the side of the road. The stockpiled topsoil was seeded
<br />with the pastureland seed mixture applied at the appropriate rate. The fmished width of the road is approximately
<br />TR09 -70 2.05 -50.3 11/16/09
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