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~• <br />f <br /> <br /> <br />(De~sition of Ron K. Thompson) <br />• <br />17 <br />1 A. In room and pillar mining you develop a <br />2 set of entries on a center design to maintain those <br />3 entries until such time as you retreat out of there <br />4 and at that time you mine rooms off to either side <br />5 on very near centers, very high extraction rate, <br />6 and you also take the coal out of the place and in <br />7 the entries you develop to achieve as much <br />S extraction as you can, so, yes, if you do that you <br />9 usually will have subsidence, and unlike long wall <br />10 mining, it may take longer. <br />11 Q. Do you have subsidence sometimes over <br />12 room and pillar mining where you don't do maximum <br />13 extraction? <br />14 A. I am not aware of that occurring. I <br />15 would not expect subsidence to occur if you'have <br />16 less than fifty percent extraction. <br />17 Q. Has there been a subsidence survey or <br />18 subsidence monitoring plan done by the mine in and <br />19 around the buildings on my property in connection <br />20 with what has been done there? <br />21 A. Prior to my employment there, their <br />22 mine plan called for advancing into the alluvial <br />23 valley, which includes your house, includes being <br />24 under the railroad, and it's my understanding that <br />25 for that reason Wyoming Fuel Company, Bob Green and <br />EARL E. MEEK & ASSOCIATES <br />311 West 12th St., Pueblo, Co. 81003 (719) 542-1010 <br />