2014-10-31_PERMIT FILE - C1981044 (9)

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IMPACTS OF MINING ON THE YAMPA AND WILLIAMS FORK RIVER AVF' S Full extraction mining was conducted in the Wise Hill No. 4 Mine under a portion of the northern end of the Williams Fork River AVE To date, no serious impacts have been noted due to this mining. Since this mining was conducted prior to MCM or predecessor company's operations, MCM assumes no liability for any potential environmental impacts caused by this Mine. No adverse subsidence or related effects have been observed or are anticipated from the development mining that was completed in the No. 5 or No. 9 mines in the Big Bottom area or under the Williams Fork or Yampa Rivers. This is based on the consideration that retention of support pillars in the development areas has and will continue to prevent or minimize any associated subsidence. Given this consideration, no damage to the irrigation ditches that serve the Big Bottom area has occurred or is anticipated. No surface facilities, except for the ground water monitoring wells, are located in the Big Bottom area. The limited disturbance area associated with these ground water monitoring wells is insignificant in comparison to the aerial extent of the Big Bottom AVF area. Flood irrigation practices may be reestablished on the Williams Fork River AVF on completion of the reclamation activities. The surface facilities will be removed, suitable soil materials replaced, and the site seeded with the pastureland (hayland) seed mixture. As discussed in Section 2.05.4, Reclamation Plan, the sloped upland areas will be seeded with the rangeland/wildlife seed mixture. No full extraction mining is currently planned or anticipated under either the Yampa or Williams Fork AVF's. Dependent on future plans and opportunities, the potential exists for further development and mining under either the Yampa or Williams Fork AVF's, however, additional baseline information and analyses of the potential impacts on the AVF's will need to be developed and provided as part of a future permit application submittal(s). 2.06.9 AUGERING MCM does not plan to conduct augering operations in conjunction with its underground mining activities, therefore, this section is not applicable. 2.06.10 COAL PROCESSING PLANTS AND SUPPORT FACILITIES NOT LOCATED WITHIN PERMIT AREA MCM does not have any coal processing plants and/or support facilities not located within the Permit Area. 2.06.11 IN SITU PROCESSING ACTIVITIES MCM plans no in -situ mining or processing activities in conjunction with the planned underground mining Operations, therefore, this section is not applicable TR13 -36 2.06 -4 Revised 06/23/14