GENERAL52957 - Laserfiche WebLink

Home Browse Search

without interruption or significant damage to the powerline towers. Power company personnel inspected the powerline after subsidence had occurred and found that deformation oFthe structures was within company specifications and did not require Twenrymile Coal Company to conduct repairs. Information regarding subsidence of the Hayden-Gore powerline can be found in the 1997 and 1998 Subsidence Reports. Existine Residences/Structures Three residences were undermined and subsided during the mining of Eastern Mining District longwall panels 6R and SR. One residence is occupied year round, one is inhabited on a limited basis, while the third is vacant and owned by Twentmile Coal Company. Twenrymile Coal Company has a subsidence agreement with the owner of the residences not owned by Twenrymile Coal Company. Twenrymile Coal Company has repaired subsidence damage to the smaller residence and replaced the larger residence. Persons living in the larger residence were relocated while mining and structure replacement occuted in the fall of 1999 and spring of 2000. Foidel Creek/Middle Creek No specific subsidence contro{ plan is proposed for Foidel or Middle Creek. Recommendations presented in Exhibit 7i, Subsidence Effects on Streams, call for channel morphology to be evaluated if headcutting or incising of the channel occur for more than 400 feet from the point of origin of the headcut. Any proposed mitigation would be based on the results of this evaluation. Lieske head¢ate and USGS water monitorin site 700 These two structures will be monitored to detect damage or improper function. If function is impaired, each will be re-aligned or re-leveled, as necessary, prior to seasonal use periods. 1. The applicant has proposed a subsidence control plan in accordance with Rule 2.05.6(6) and has committed to adopt all measures in order to reduce the likelihood of subsidence, prevent material damage, or mitigate the effects. A detailed description of the monitoring program for each structure within the Eastem Mining District begins on page 2.05-182 of the permit application. The results of the monitoring program will be submitted to the Division semi-annually. Exhibit 34 of the permit outlines the requirements for the subsidence report. The Division proposes to approve the plan (4.20. l (2) and 4.20.3(1)). XVI. Concurrent Surface and Underground Mining The Division has previously granted a variance from contemporaneous reclamation for potions of the permit area in order that underground mining can be developed. This variance applies to the Area 2 pit and associated spoil from the CYCC Mine No. 1, Mine No. 2, and Eckman Park operation. Currently this area is occupied by the portals as well as other facilities necessary to [he Foidel Creek operation. TCC will be responsible for the reclamation of this area when underground mining operations have ceased (4:22.3). The Division finds that the requirements of Rule 4.22.3 have been met. XVII. Auger Mining The requirements of this section do not apply. C:1JH B\C82056\RN031RN03FI N D.doc 26