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West EIk Mime <br />interconnection between the surface fractures and the mine workings is anticipated. Again, <br />under a worst case scenario, if a surface fracture were to occur concurrently within an area <br />controlled by faults or bedrock lineaments, there could be interconnection between adjacent <br />sandstones. However, even under these conditions, the fractures would most likely not extend <br />through the claystones and shales present in the overburden. <br />Monument Dam and Minnesota Reservoir are located outside of the angle of mining influence of <br />the nine projected. panels (panels El through E9) for the South of Divide mining area (see Map <br />51). The northwest corner of panel E9, which is nearest to the reservoir, is located 800 feet <br />away. The angle of draw to this nearest area of mining is 69°. The angle is much greater than <br />the maximum of 20° projected for the SOD mining area. This means that Minnesota Reservoir <br />will not be affected by longwall mining in projected panel E9. <br />Reduction Measures (Underground) - 2.05.6 (6)(f)(iii)(B)(I--III) <br />Underground measures that may be taken to reduce surface strains above the chain pillars could <br />include, but are not limited to; (1) Designing the pillars to yield and crush after mining (thus <br />minimizing humps in the subsidence profile), and/or (2) Planning a rapid and uniform mining <br />rate. Any plans in order to reduce chain pillar dimensions to reduce subsidence impacts must, <br />of course, be balanced with health and safety conditions in the mine. Plans for a rapid and <br />uniform mining rate are affected by market demands (or lack there of) for constant, high <br />volumes of coal. MCC will notify CDMG if plans that may affect the subsidence profile are <br />implemented. <br />Preventive Measures (Surface) - 2.05.6 (6)(f)(iii)(C)(I-i~ <br />Surface measures that may be taken to reduce or prevent damage to applicable structures or water <br />resources could include, but are not limited to; (1) Engineering, design, and construction of <br />structures to withstand varying ground stresses, see Exhibit 76 for Monument Dam Preventative <br />Measures. The Exhibit includes the Design Report for Alteration, the Technical Specifications and <br />all the drawings associated with the preventative measures (2) Re-locating structures or ponds to <br />mid-panel or outside the angle of mining influence, and/or (3) Enhancing or reinforcing water <br />resource production or delivery systems (e.g., pipeline), respectively. <br />......................... <br />befailed l)escripfion of Mitigafine Measures ~- 2.0~ 6(6) (f) (iv) (A-D) <br />Impacts to structures (buildings) and ground and surface water resources will be monitored and <br />mitigated, if necessary, as presented later in this section, in Sections 2.04.7(3) and <br />2.05.6(6)(e)(ii)(A-C), in Exhibit 19C, and in Exhibit 52. Monitoring personnel (e.g. hydrology, <br />subsidence survey) are regularly in the field throughout the permit area and note observations of <br />cracking, landslides, rockfalls, or other natural and/or subsidence hazards or impacts. The private <br />landowner in the Jumbo Mountain lease tract also observes and reports cracking, sliding, or other <br />unusual conditions. Roads will be repaired through regarding or filling if adversely affected by <br />subsidence. Should cracking or blockage of a trail or an unimproved road that is open for use (i.e. is <br />not blocked, reclaimed, or otherwise "closed" from use) occur from subsidence, the damage would <br />be repaired (i.e. fill crack, buttress, install drains, or remove blockage etc.) or the area barricaded or <br />blocked to prevent access. MCC will also place an informational sign along the primary public <br />access to the USFS lands for mining and/or natural hazards awareness. <br />2.05-l70 Revised June 2005 PRl Q Rev. March 2006; May 2006 PRIG, IVov. 2006TRl07, ,9pril 2007TR708 <br />