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Page 1 of 1 <br />July 20, 2015 <br />CHANGE SHEET FOR PERMIT REVISIONS, TECHNICAL REVISION, AND MINOR REVISIONS <br />Mine Company Name: Colowyo Coal Company Permit Number: C-1981-019 <br />Revision Description: TR -105 Postmining Topography <br />Modification <br />Volume Page, Map or other Permit Page, Map or other Permit Entry Description of Change <br />Number Entry to be to be <br />REMOVED ADDED <br />Page 1 <br />Updated Exhibit 7, Item 14, Table 1 Summary of Ditch and <br />2C <br />Page Exh. 7-14-6 to 8 <br />Page Exh. 7-14-6 to 8 <br />Channel Design Parameters as a result of updated SEDCAD <br />modelingfor revised PMT <br />Provided new introductory text for Streeter Gulch Ditch, SW <br />2C <br />Pages Exh. 7-14E-1 thru 30 <br />Pages Exh. 7-14E-1 through 28 <br />Trib to Streeter and SE Trib to Streeter with new SEDCAD <br />modelling for revised PMT and watershed boundaries <br />2D <br />Exhibit 7, page 10 <br />Exhibit 7, page 10 <br />Update one page summary (Table 6) for edits to Streeter <br />Pond <br />2D <br />Exh. 7 -Streeter Intro. -1 to 4 <br />Exh. 7 -Streeter Intro. -1 to 4 <br />Added Introductory Text Section immediately preceeding page <br />Exh. 7 -SP -1 <br />2D <br />N/A <br />Exh. 7 -SP -128 to 187 <br />Added new SEDCAD modeling in support of PMT change <br />within Streeter Pond drainage. <br />2E <br />Pages Exh. 7 -ET -1 to -7 <br />Pages Exh. 7 -ET -1 to 7 <br />Revised Introductory text and SEDCAD models for Exh. 7 -ET <br />as a result of the PMT change and watershed boundaries. <br />Revised Introductory text and SEDCAD models for Exh. 7 -ET <br />2E <br />Pages Exh. 7 -ET -8 to -102 <br />Pages Exh. 7 -ET -10 to 96 <br />as a result of the PMT change and watershed boundaries. <br />(The two figures on pages Exh. 7 -ET -8 and 9 remain <br />unchan ed from ori inal Feb. 15 submittal. <br />12 <br />Rule 4, Pages 23 and 24 <br />Rule 4, Pages 23 and 24 <br />Text describing operations on steep slopes has been <br />removed. <br />13 <br />Page Exh. 7-20-2 <br />Page Exh. 7-20-2 <br />Revised Table 4 for changes to Sec 28 and West Taylor <br />Ponds <br />13 <br />Exhibit 7, Item 20, Part E <br />Exhibit 7, Item 20, Part E <br />Revised Introductory text to address small stock tanks <br />Pa es 7-20E-1 through 66 <br />Pages 7-20E-1 to 5 <br />Resubmitted without changes from June submittal <br />Exhibit 7, Item 20, Part G <br />Exhibit 7, Item 20, Part G <br />Revised terrace ditch design text and SEDCAD modeling for <br />13 <br />Pages 7-20G-1 through 8 <br />Pages 7-20G-1 through 8 <br />proposed PMT. (Resubmitted without changes from June <br />submittal <br />Exhibit 21, Item 1 <br />After the existing approved text (Figure 12) in Addendum 4, <br />13 <br />N/A <br />pages Addendum No. 5-1 and 2 <br />add Shannon and Wilson Addendum 5 letter regarding the <br />South Taylor Fill stability analysis. <br />Page 1 <br />