2015-10-06_PERMIT FILE - C1981019A (3)

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RULE 4 PERFORMANCE STANDARDS Mountain Brome @ 4 Lbs PLS/Acre Kentucky Bluegrass @ 2 Lbs PLS/Acre Sanfoin @ 2 Lbs PLS/Acre Total 12 Lbs PLS/Acre Following construction, a report by a registered professional engineer shall be provided to the Division indicating that the roads have been built as designed. Following mining activities, the road may remain in place as a private ranch road and therefore would not be reclaimed. Colowyo as the land owner will provide the Division with a letter documenting this request at the appropriate time. 4.03.3 Light -Use Roads Light roads may be used in portions of the Collom permit expansion area and are shown on Map 22B. Construction and maintenance of these roads are discussed in the original permit document. There will be no changes to this section resulting from the Collom Lite and Little Collom X pits. 4.04 SUPPORT FACILITIES The original support facilities used at the mining operation, including the office, shop and warehouse complex, and the coal handling and loadout facilities may continue to serve as minor support facilities for this expansion and are shown within the original Colowyo Permit Map 21 and Map 22, Volume 8. Many of the support structures were constructed at the mine start-up in 1976-1977. The complete discussion on all the original support facilities is found under Section 2.05.3 of the existing permit document. Additional facilities, including a shop and warehouse facility, coal crushing, explosives bunker, sedimentation ponds, utility lines, water lines, and haul roads will be constructed in and around the Collom Lite and Little Collom X pit areas. These facilities are detailed in the Structure and Facilities Map 22B. Detailed drainage and sediment control has been developed for the mining operation and support facilities as discussed in Section 2.05.3. All sediment control measures in the permit expansion area will be designed to prevent damage to wildlife and other related environmental values; also, sediment control structures in the permit expansion area will be designed to prevent contributions of suspended solids to runoff outside the permit area in excess of the limitations of both federal and state law. As discussed throughout this submittal, Colowyo will conduct the surface mining activities in a manner that will minimize impacts on the environment. There are no operating oil or gas wells at or around the planned mine; likewise, there is no coal slurry pipeline planned or around the mining area. The only operating railroad in the vicinity of the mine is the Colowyo spur line that serves the operation. All White River Electric and Tri-State Generation and Transmission Association, Inc. power lines are located out of the actual mining area. The Mountain Bell telephone lines are located outside of the actual mining areas. All water and sewer lines located in the permit area serve the Colowyo structures and are located away from the actual mining areas. 4.05 HYDROLOGIC BALANCE 4.05.1 General Requirements Cullom — Rule 4, Page 3 Revision Date: 9/28/11 Revision No.: PR -03