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Minor Revision 400 — This revision added a drainage pipe into a portion of the upper <br />RPEE sediment ditch. The revision was received on 4 October 2013, <br />deemed complete on 9 October 2013 and approved on 9 October <br />2013. <br />Minor Revision 401 — This revision added riprap lining into a portion of the RPEE <br />sediment ditch. The revision was received on 24 October 2013, <br />deemed complete on 4 November 2013 and approved on 4 November <br />2013. <br />Minor Revision 402 — This revision added a culvert in the RPE Pond ditch. The revision <br />was received on 29 October 2013, deemed complete on 4 November <br />2013 and approved on 4 November 2013. <br />Minor Revision 403 — This revision added a temporary topsoil stockpile and culvert at the <br />RPEE. The revision was received on 18 December 2013, deemed <br />complete on 27 December 2013 and approved on 17 January 2014. <br />Technical Revision 128 — This revision provided details regarding the remediation of the <br />HR -1 and ST -02 slides. The revision was received on 28 March <br />2012, deemed incomplete on 6 April 2012, deemed complete on 8 <br />June 2012 and approved on 31 May 2013. <br />Technical Revision 129 — This revision permitted the locations of the longwall panel E4 <br />methane drainage wells and light -use roads. The revision was <br />received on 14 May 2012, deemed complete on 24 May 2012 and <br />approved on 11 July 2012. <br />Technical Revision 130 — This revision permitted the locations of the longwall panel E5 <br />methane drainage wells and light -use roads. The revision was <br />received on 14 March 2013, deemed complete on 25 March 2013 and <br />approved on 14 May 2013. <br />Technical Revision 131 — This revision added a steep slope seed mix to the permit. The <br />revision was received on 17 September 2013, deemed complete on 27 <br />September 2013 and approved on 21 October 2013. <br />Colowyo Mine 2010 Midterm Review <br />Permit No. C- 1981 -019 10 May 2010 <br />6 <br />