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• <br />c~RUs <br />Yampa Valley <br />• iii iiiiiiiiiiiiiiii <br />999 <br />Cyprus Yampa Valley Coal Corporation <br />29587 Routt County Road N27 <br />Oak Creek, Colorado 80467 <br />303-879-3800 <br />October 12, 1990 <br />David Berry, Reclamation Specialist <br />Colorado Mined Land Reclamation Division <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203-2273 <br />Dear Mr. Berry: <br />i I <br />'I ..... ..- ..~ 1 M. ~~ <br />i;CT 1 8 i9;i0 <br />:iir.a~ Land <br />Rec!2maiion ~~ivisior. <br />RE: Subsidence Report. Twentymile Coal Company: Permit C-82-056 <br />Attached, please find the subsidence summary table, map, and cross-sections for the <br />first half of 1990. These materials show the extent of subsidence and the area mined <br />during the first half of 1990. As shown on the table and the cross-section the <br />maximum subsidence is 3.5 feet and is located in the center of the pane(. This <br />information is consistent with the projections made in the permit. <br />If there are questions, please contact me at your convenience. <br />Sincerely, <br />/'~ <br />Richard Mills <br />Supervisor; Environmental Affairs <br />RAM/rm <br />Attachment <br />