2014-10-31_PERMIT FILE - C1981044A

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following vegetation establishment. The regraded surface will be left in a roughened condition to minimize slippage and promote root growth and moisture infiltration. The postmining topography of the area is shown on the Reclamation Plan Map (Map 29). Suitable plant growth media will be redistributed over the regraded area, and the reclaimed area will then be planted with a cover crop, and subsequently drill seeded with the rangeland/wildlife habitat seed mixture. If it is necessary to apply the seed by the broadcast method, the seeding rate will be doubled. The sediment ponds and associated drainage structures will remain in -place until final release, and will then be removed. Soil materials salvaged from the pond areas will be used to reclaim the ponds. The ponds will be graded to blend into the natural topography and seeded with the rangeland/wildlife habitat seed mixture. Coal Storag"oading Silo When no longer needed to support ongoing or potential future mining and related operations, the coal silo will be demolished. Given that it sets over the railroad spur, and its proximity to the Williams Fork River, special measures will be implemented, as appropriate, to protect the spur track and river. If the spur track is to be retained to support an alternative postmining land use (to be determined in the future), the rail and ties in the area of the silo will either be temporarily removed then replaced after completion of the silo demolition, or will be protected by placement of a dirt fill cover. Measures to protect the nearby Williams Fork River during demolition will include temporary placement of a protective barrier between the silo and river, and controlled demolition to direct demolition debris away from the river. The protective barrier would either be a substantial earth berm between the silo and river, or a line of concrete barriers with silt fencing or similar material to prevent demolition debris and any runoff from the demolition area out of the river. It should be noted that the main channel of the river is separated from the silo area by both a substantial river bar and a small side channel. Controlled demolition practices (either mechanical or explosive) will be used to bring down and demolish the silo structure. There is a large open area to the west - northwest of the silo which will allow demolition debris to be directed away from the river. Given the importance of protecting the river, MCM will select and work with a qualified and experienced demolition contractor to develop specific plans for the silo demolition, and will submit those plans for CDRMS review and approval prior to initiation of the silo demolition activities. The resulting concrete and other debris from the silo demolition will either be placed at the toe of the face -up highwall at the portal area prior to backfilling or will be hauled off -site. Once demolition of the silo and removal of the resulting debris is completed, the associated surface disturbance area will be reclaimed as part of the No. 5 Portal area reclamation, as previously described. Overland Conveyor All of the overland conveyor systems and facilities will be dismantled or demolished, including supports and footings. It is anticipated that removal of the conveyor segments which cross over State Highway 13 and the Williams Fork River will require special measures, including coordination with the Colorado Department of Transportation, temporary closure of the highway during conveyor removal operations, and the use of one or more high -lift cranes to remove, lift, and transfer the individual conveyor segments to trucks for removal from the site. All material capable of being salvaged will be salvaged. Any unsalvageable inert materials may be placed at the toe of the face -up highwall at the portal area prior to backfilling and/or placed in the 5A underground workings near the portal entries. Similar to other pre -law disturbance areas, topsoil salvage was limited, so the upper weathered overburden material will be recovered prior to backfilling and used as suitable plant growth media in reclaiming the site. The affected areas will be backfilled and graded using adjacent spoil materials from the previous surface mining operations and material from conveyor and stockpile pads. The backfilling and grading operations will leave the regraded surface in a roughed condition to minimize slippage and promote root growth and moisture infiltration. Contour ditches or furrows will be constructed on reclaimed slopes to reduce erosion and provide for effective drainage. These ditches or furrows will be approximately 20 to 50 feet apart and have check -dams placed at periodic TR14 -36 2.05 -28 Revised 03/10/14