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• <br />• <br />46 <br />2.05.6(6) <br />so surface fracturing should be minimal. The Dove Gulch pond, SP34 -2, is <br />located near the center of panel B -11 at an overburden depth of 1,375 feet <br />which should minimize the risk of damage to the pond. <br />Federal Lease 37210 stipulation 'g' states in part: "Coal extraction will be <br />limited in buffer zones established along East Roatcap Creek and Stevens <br />Gulch where the overburden is 600 feet or less ". Therefore, permanent <br />protective pillars are not required under Stevens Gulch since the overburden <br />at the end of the B10 and B -11 panels is approximately 1500 feet. A limited <br />extraction zone will not be established along the northern section of Stevens <br />Gulch as it passes through Sections 1 and 12. <br />The 1 West Mains go under Terror Creek and the Curecanti -Rifle 230/345 -KV <br />transmission line and support towers as shown on Map 14 -13. A limited <br />extraction zone has been established where the mains cross under Terror <br />Creek and the transmission line. A report prepared by Hamid Maleki titled <br />"Overburden Stability Evaluation at Terror Creek Crossing" demonstrates the <br />support pillars in the 1 West Mains under Terror Creek will have a minimum <br />factor of safety of 2.5. The report is presented in Volume IIIA, Tab 16. <br />A limited extraction zone will be established under WAPA transmission line <br />towers. <br />(f)(iii) A narrative of the detailed description of the measures to be taken to prevent <br />subsidence from causing material damage or lessening the value or <br />reasonably foreseeable use of the surface follows: <br />(f)(iii)(A) <br />The anticipated effects of planned subsidence are explained above and are <br />presented in detail in Volume IIIA, Exhibit 15, 17 and 21. <br />(f)(iii)(B) <br />The measures to be taken in the mine to reduce the likelihood of subsidence <br />are explained above. The mine plan will leave support pillars under Pond P- <br />1, adjacent to Hubbard Creek, Terror Creek and near the outcrop. The long <br />term stability of the support pillars were evaluated in Volume IIIA Exhibit 15, <br />Section-1 -.9- A study performed by Hamid Maleki located in Volume 111A, <br />Exhibit 16 shows the pillars in the main entries under Terror Creek have a <br />PR -12 2.05-151- 02/10 <br />A PPRov(= p <br />/ ///6 // a <br />