2016-02-29_REVISION - C1981019 (4)

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CHANGE SHEET FOR PERMIT REVISIONS, TECHNICAL REVISION, AND MINOR REVISIONS Mine Company Name: Colowyo Coal Company Permit Number: C-1981-019 Date: February 26, 2016 Revision Description: PR -04 Collom Volume Page, Map or other Permit Page, Map or other Permit Description of Change Number Entry to be Entry to be 16 INo Change 17 No Change 18 Exhibit 7-23, page 7-23-1 (1 page) Exhibit 7-23, page 7-23-1 (1 page)Updated the introductory text in response to review comment 45. 18 Exhibit 7-23, Part A, page Exh. 7-23A Exhibit 7-23, Part A, page Exh 7-231A.Timing changes have been made to the clean water diversion structures. 1 (1 page) 1 (1 page) Exhibit 7-23, Part A, pages Exh. Exhibit 7-23, Part A, pages Exh. 18 7-23A-7 through Exh. 7-23-11 (5 7-23A-7 through Exh 7-23-11 (5 Timing changes have been made to the clean water diversion structures. pages) pages) 18 Exhibit 7-23, Part I, pages Exh. 7-231- Exhibit 7-23, Part I, pages Exh. 7-231- Revised introductory text in Exh. 7-23 Part I 1 through Exh 7-231-5 (5 pages) 1 through Exh 7-231-5 (5 pages) 18 Exhibit 7-23, Part I, pages Exh 7-231- 8 through Exh 7-231-154 (146 Exhibit 7-23, Part I, pages Exh. 7-231- Revised figure and all 4 SEDCAD models in response to review comments pages) 8 through Exh 7-231-154 (146 pages) and timing changes. 19 No Change 20 Figure Exh 27 Item 1 Figure Exh 27 Item 1 Figure Exh. 27 Item 1 has been updated with approved materials from MR - 150 21 No Change 22 List of Mas 2 pages) List of Maps (2 pages) List of Mas has been updated as well as revisions to the footer. 22 Map 236 Map 23B Mine plan timing has been updated 22 Map 28C Map 28CTopsoil timing has been updated. 22 Map 29B Map 29B Spoil grading timing has been updated. 22 Map 41C Map 41C Watershed boundaries in updated to reflect the timing changes.