2014-01-08_PERMIT FILE - C1981019A

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RULE 4 PERFORMANCE STANDARDS The Sturgeon Access road cut /fill stabilization seed mix is as follows: Western wheatgrass @ 4 Lbs PLS /Acre 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 road has been built as designed. Following all mining activities, the road will remain in place as a private ranch road and will not be reclaimed. Colowyo as the land owner has provided the Division with a letter documenting this request. 4.03.3 Light -Use Roads This section is discussed in the original permit document. There will be no changes to this section resulting from the South Taylor pit. 4.04 SUPPORT FACILITIES The support facilities used at the mining operation, including the office, shop and warehouse complex, and the coal handling and loadout facilities will continue to be used for this expansion and are shown on the original Map 21 and Map 22. Many of the support structures were constructed at the mine start-up in 1976- 1977. The complete discussion on all the support facilities is found under Section 2.05.3 of the existing permit document. Detailed drainage and sediment control has been developed for the mining operation as discussed in Section 2.05.3 of the existing permit document. All sediment control measures in the South Taylor /Lower Wilson permit area will be designed to prevent damage to wildlife and other related environmental values; also, sediment control structures in the South Taylor /Lower Wilson permit area will be been 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 The surface mining activities at Colowyo have been planned and will be conducted to minimize changes in the prevailing hydrologic balance, in both the permit and adjacent areas, and to prevent long term adverse changes in the balance that might result from the activities. As a preliminary step in minimizing adverse changes, hydrologic baseline information has been and is being collected, compiled and analyzed. The baseline monitoring programs are outlined in Section 2.04.7. This data South Taylor /Lower Wilson — Rule 4, Page 3 Revision Date: 10/31/13 Revision No.: MR -129