Laserfiche WebLink
Rule 2.05.6(6)(d) requires the applicant to complete a projection of <br />possible consequences of subsidence for the structures and renewable <br />lands identified during the required inventory. The amended permit <br />application observes: <br />"The worst possible consequences of subsidence are as follows: <br />For the maximum extraction height of 12 feet in the No. <br />6 Mine longwall panels, the maximum longwall subsidence <br />will be 7.5 feet. <br />Where the No. 6 Mine longwall mining undermines the No. <br />5 Mine "first mined" room-and-pillar workings, maximum <br />subsidence will be 10.6 feet, assuming failure of the <br />No. 5 MIne "first mined pillars. <br />Where the No. 6 Mine longwall mining undermines the No. <br />5 Mine longwall workings, maximum subsidence will be <br />10.3 feet. <br />The average angle of draw will be 19 degrees. <br />Possible development of surface cracking where the <br />overburden is less than 500 feet thick and the soil <br />cover is thin. <br />The predicted maximum possible worst case subsidence for the <br />various structures and renewable resource lands is summarized <br />in the permit revision application on Table 79, Maximum <br />Predicted Worst Case Subsidence on Structures and Renewable <br />Resource Lands. <br />A summary of the anticipated degree of subsidence impacts on <br />structures and renewable resource lands is presented in the <br />permit revision application on Table 80, Anticipated Degree <br />of Subsidence Impact on Structures and Renewable Resource <br />Lands Based on Maximum Predicted Worst Case Subsidence." <br />C. Subsidence Control Plan <br />worst <br />resource <br />Briefly summarized, Empire Energy Corporation proposes to limit subsidence to <br />critical structures and renewable resource lands within the five year permit <br />period area by avoidance. As stated on pages 2.05:6(6)-13R, -13Ra 8 -14 of <br />the amended permit application; State Highway 13, the railroad ;pur, the Yampa <br />and Will tams Fork rivers, and the private residences are all outside the area <br />projected to be subsided during the five year permit period. <br />In the case of the AMOCO oil pipeline, Empire Energy Corporation responded to <br />Division preliminary adequacy review comments by amending page 2.05.6(6)-13R <br />to state: <br />"Empire Energy Corporation (EEC) has established communications with <br />Amoco Pipeline Company to determine the most practical means to mitigate <br />-64- <br />