2010-08-31_REVISION - C1981019 (2)

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Jennifer Sekulski-Barton pew, Colowyo Coal Company G 5731 State Highway 13 Meeker, CO 81641 M-+ T: 97o-824-1529 O 30 August 2010 Mr. James R. Stark Environmental Protection Specialist Colorado Division of Reclamation, Mining and Safety Department of Natural Resources 1313 Sherman Street, Room 215 Denver, CO 80203 RE r% 7J'%Z D AUG 3 p LQ3 Division or Reciamation, Wbiv aw So* RE: Division Incompleteness for Technical Revision - 88, West Taylor Temporary Out of Pit Spoil Extension, Colowyo Coal Mine, Permit No. C-1981- 019. Dear Mr. Stark, Colowyo received the Division's incompleteness comments for TR-88 on 26 August 2010 and has the following comments and responses: Division's Comment 1. The enclosed "Change Sheet for Permit Revisions, Technical Revisions and Minor Revisions" for Technical Revision 88 indicates that new Pages Exhibit 7- 20C-83 through 98 have been included for review. These pages include new Figures 1 C-4 and 1 C-5 and a new SEDCAD model for the West Taylor Pond. There were no pages Exhibit 7-20C-83 or 84 included (which the Division assumes are new Figures 1 C-4 and 1 C-5). Please submit two copies of pages Exhibit 7-20C-83 and 84 for the Division's review. Colowyo's Response: Colowyo has included the requested pages and apologizes for the oversight in the original Technical Revision 88 submittal. Division's Comment 2. The enclosed "Change Sheet for Permit Revisions, Technical Revisions and Minor Revisions" for Technical Revision 88 indicates that updated page Exhibit 7- 20-ii has been included. Colowyo has, however, also included updated page 7- 20-1. Please update the "Change Sheet for Permit Revisions, Technical Revisions and Minor Revisions" for Technical Revision 88 to indicate that page 7- 20-1 has also been included for review. Colowyo Coal Company - 5731 State Highway 13 - Meeker, CO 81641 T+ 1 970 824 1529 - F+ 1 970 824 1598 - http://prospect.riotinto.org/irj/portal