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/~ Kennecott Colowyo Coal Mine <br />5731 State Highway 13 <br />~ .Energy Meeker, Colorado 81641 <br />Telephone: (970)824-1579 <br />Fax: (970) 824-1598 <br />Tay Tonoal <br />Sr. Environmental Engineer <br />March 22, 2006 <br />Mr. Jim Stazk RECEIVED <br />Environmental Protection Specialist <br />Colorado Division of Minerals & Geology MpR 2 7 2006 <br />1313 Sherman Street -Room 215 <br />Denver, Colorado 80203 p~~ision ~i Minerals and Geology <br />RE: Map Scale, Colowyo Coal Mine, Permit No. C-81-019 <br />Dear Mr. Stark, <br />In response to your January 17, 2006 letter, we have reviewed the existing perntit documents and <br />prepazed a potential list of maps to be drafted at 1"=1000' scale. <br />Map 4 -Vegetation <br />Map 5 -Soils -North <br />Map 6 -Soils -South <br />Map 7 -Geology {currently at 1 "=2000' but could be converted) <br />Map 1 I -Hydrology -North <br />Map 12 -Hydrology -South <br />Map 18 - Premining Topography <br />Map 19 -Postmining Topography <br />Map 19A -Postmining Topography - Gossard Area <br />Map 21 -Existing Structures -North <br />Map 22 -Existing Structures -South <br />Map 34 -Bond Calculation Map -Worst Case Topography North Area <br />Map 35 -Bond Calculation Map -Worst Case Topography South Area <br />Map 36 -Bond Calculation Map -Regraded Topography South <br />Map 41 -Watershed Boundaries for Hydrologic Mapping <br />If the Division agrees with the use of a map scale of 1"=1000' for the drawings identified above, <br />please advise the Colowyo Mine in writing. If you have any questions or just require additional <br />information, please don't hesitate in contacting me at the phone number above. <br />Sincerely, <br />a3' y Ton t <br />Senior Environmental Engineer <br />ca 17.20 Correspondence <br />Antelope Mine • Colowyo PAine • Cordero Rojo Mine • Jacobs Ranch Mine • Spring Creek Mine <br />A member cf the Rio Tinto Group <br />