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<br />March 31, 2008 <br />Mr. James R. Stark <br />Environmental Protection Specialist <br />Colorado Division of Reclamation, Mining and Safety <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />A~~ ®~. ~ooa <br />Div-s~~~~ u~ ,.~~c-amat-on, <br />Mining and Safety <br />RE: Technical Revision No. 71, Section 16 Pond Ditch Extension, Colowyo Coal Mine, Permit No. <br />C-81-019. <br />Dear Mr. Stark, <br />Enclosed please find two copies of materials provided for Technical Revision No. 71. This change updates <br />Map 12 to show the location of the Section 16 Pond Ditch Extension. This is the second extension of the <br />ditch. The first extension was permitted under TR-65. This second ditch extension is needed to direct <br />disturbed area runoff back to Section 16 Pond until the Section 21 Pond is completed. <br />~ext within Volume 2C, Item 140 is being revised to provide the updated hydrologic design. The <br />ydrologic design eliminates two sediment traps along the disturbed area boundary that were previously <br />permitted under TR-65. <br />Also included with the revision package are an application form, the public notice and an index sheet. <br />If you have any questions or require additional information, please feel free to contact me at (970) 824-1578. <br />Sincerely, <br />,~ I <br />Ryan Pawlowski <br />Environmental Engineer <br />Encl. 2 copies <br />Cc: file CF 1.1.2.60 <br />• <br />