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• 2.05.6(6) <br />Pond P-1 is located in a zone of greatest subsidence impact. For this <br />reason, this pond will be protected by a limited extraction zone. The limited <br />extraction zone is defined by extending a safety zone a distance of fifty feet <br />around the pond and then projecting a line down at the angle of draw until it <br />intersects the coal seams. <br />Pond P-2 is located in a zone of intermediate subsidence, however the <br />overburden below P-2 is nearly 1,000 feet. For all practicable purposes P-2 <br />is in a zone of minor subsidence. Therefore, no limited extraction zone will <br />be provided for Pond P-2. <br />Ponds P-3 through P-6 are located in a zone of minor subsidence in an area <br />of overburden greater than 1,000 feet. Therefore, no limited extraction zone <br />will be provided for Ponds P-3, P-4, P-5 and P-6. <br />Five additional ponds are located within the permit boundary in zones of <br />minor subsidence. They are Pond 33-3, Spring/Pond 33-5, Pond 33-7, <br />• Spring/Pond 34-2 and Spring/Pond 34-11. Two ponds are located outside of <br />the permit boundary in zones of minor subsidence. They are Pond 32-3 and <br />Spring/Pond 33-6. Refer to Map 9, Hydrologic Location Map for location <br />information. <br />No limited extraction zones are proposed for any of the ponds except Pond <br />P-1 because they all lie in zones of minor subsidence impact. <br />A limited extraction zone was established along the bleeder entries in the <br />vicinity of Freeman Gulch and the vent shaft in Freeman Gulch. This limited <br />extraction zone was established to assure subsidence does not affect the <br />stability of adjacent old landslides to the extent their deformations were <br />renewed. <br />Portions of Hubbard Creek and Hubbard Creek road are located in a zone of <br />greatest subsidence impact. For this reason, these areas will be protected <br />by a limited extraction zone. The limited extraction zone is defined by <br />extending a safety zone a distance of one hundred feet from the creek then <br />• projecting a line down at the 25° angle of draw to the coal seam. <br />PR-11 <br />2.05 - 113 - 11 /08 <br />~ pp~.ovE~ <br />