Laserfiche WebLink
Ci up:er IV <br /> Mid-Continent requested suspension of the subsidence monitoring program cn <br /> the basis that there is no evidence or likelihood of damage to or diminution of <br /> renewable resource lands or aquifer recharge areas, or to foreseeable use of <br /> structures or renewable resource lands. <br /> A Technical Revision, approved February 3, 1986, allowed suspension of the <br /> semi-annual subsidence monitoring requirement, (See Appendix IV-F-5) on <br /> condition that the monuments be re-surveyed at the end of the permit term <br /> (1988) . <br /> The survey was done in August, 1988. The data compiled are contained in <br /> Appendix IV-F-4. <br /> In subsequent years (starting 1989) Mid-Continent will make an annual visual <br /> subsidence inspection of the area above the Coal Basin Mines which could <br /> potentially be affected by ground subsidence. The inspection will be carried out <br /> during the summer months, as necessary because of snow conditions. The <br /> area will be determined by projecting the boundaries of underground extraction <br /> upward from the mined seam to the ground surface along an angle of draw of <br /> 20.5 degrees from vertical. A report summarizing the results of the annual <br /> subsidence inspection will be submitted to MLRD prior to December 31. <br /> Prior to implementation of multi-lift longwall mining, Mid-Continent will revise the <br /> Collins Subsidence Study (submitted in December, 1985 and contained in <br /> Appendix IV-F-4) to reflect the subsidence data obtained during the 1938 <br /> subsidence resurvey and any subsequent resurveys. Such revision will be <br /> submitted to the Division for review. Such revision will also be done and <br /> submitted with any request by Mid-Continent to MLRD for an amendment to the <br /> Coal Basin mine plan which involves expansion of the potentially subsided area. <br /> In addition, Mid-Continent will provide a monitoring progm acceptable tor . - <br /> MLRD prior to implementation of multi-lift mining. The plan will be submiLL=d in <br /> advance of the summer season preceding implementation of the multi-G <br /> program. <br /> 3� <br />