2015-08-07_REVISION - C1981019 (2)

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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: August 3, 2015 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 REMOVED ADDED 17 No Change 18 Page Exh. 7-23A-1 through Exh. 7- Page Exh. 7-23A-1 through Exh. 7- The introduction text for Exhibit 7, Item 23, Part A has been updated in 23A-4 (4 pages) 23A-4 (4 pages) response to comments. 18 Page Exh 7-23A-8 through Exh 7- Page Exh 7-23A-8 through Exh 7- Revise Exh 7-23. Figures A2, A3, A4, and A5, which show the Clean 23A-11 (4 pages) 23A-11 (4 pages) Water Diversion Ditches, to correct scale bar error 18 Pages Exh. 7-23A-36 through Exh Pages Exh 7-23A-36 through Exh The SEDCAD outputs for Exhibit 7, Item 23, Part A have been updated in 7-23A-41 (6 pages) 7-23A-41 (6 pages) I response to comments. 18 Page Exh 7-2313-22 (1 page) Page Exh. 7-23B-22 (1 page) Exhibit 7-23B, Table 1 has been updated in response to comments. 18 Exh. 7-23, Figure B1, page Exh. 7- Exh. 7-23, Figure B1, page Exh. 7- Revise Exh. 7-23. Figure B1, the Spoil Pile Collector Ditches, to add a 236-5 2313-5 hatch pattern over the Middle Pond Area. 18 Page Exh. 7-23C-3 (1 page) Page Exh. 7-23C-3 (1 page) Exhibit 7-23C, Table 1 has been updated in response to comments Revise Exh. 7-23. Figures C1, C2, C3, and C4, which show the Watershed 18 Page Exh. 7-23C-6 through Exh. 7- Page Exh. 7-23C-6 through Exh. 7- Boundaries for the West Side and East Side Collector Ditches, to correct 23C-9 (4 pages) 23C-9 (4 pages) scale bar error, make a legend edit, and modifiey the drainage area for the D2 ditch system. Revise Exh. 7-23. Figures C5, C6, C7, C8 and C9, which provide the 18 Page Exh. 7-23C-10 through Exh. Page Exh. 7-23C-10 through Exh. Design Drawings for the 5 ponds to correct typos in the construction notes, 7-23C-14 (5 pages) 7-23C-14 (5 pages) add labels to the primary spillway and CMP, and to modify the upstream dam face to 3H -1V Page Exh 7-23C-15 through 85 Page Exh 7-23C-15 through 85 West side SEDCAD models for both the 10 year and 100 year cases have 18 (70 pages) (70 pages) been modified. After page 46, no changes were made to the East side models, except that have been included due to pagination changes. Figure Exh. 7-23, Figures D1 and Figure Exh. 7-23, Figures D1 and Modified Figures D1 and D2, which show the West Side Pond Access 18 D2 D2 Road and the East Side Access Road designs, to revise a construction note Pages Exh. 7-23G-1 through Exh. Pages Exh. 7-23G-1 through Exh. Revised introductory text of the Small Area Exception section for better 18 7-23G-27 (27 pages) 7-23G-27 (27 pages) clarity regarding modeling done for vegetative filter, revise final SEDCAD model adding conservation inputs. 18 Pages Exh. 7-25-1 through Exh. 7- Pages Exh. 7-25-1 through Exh. 7- Revise introductory text for Collom Postmine Channel Design, modified 25-3 (3 pages) 25-3 (3 pages) peak flow for Reaches 1 and 2 18 Pages Exh. 7-25-11 through Exh Pages Exh. 7-25-11 through Exh. 7 Updated SEDCAD printout for Reaches 1 and 2 models, no other changes 7-25-84 (73 pages) 25-84 (73 pages) to the other models but the remaining text has been repaginated.