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RULE 4 PERFORMANCE STANDARDS <br />.. _.. u,~:..., <br />• 4.14.3 Covering Coal and Acid and Toxic Forming Materials <br />Colowyo will not have any exposed coal seams remaining at the end of mining and reclamation. <br />Colowyo does not have any acid forming materials at the mine. For discussion on acid- and toxic- <br />forming materials, refer to Section 2.04.6. For disposal of non-coal wastes or materials constituting a fire <br />hazard, refer to Section 4.11.4. <br />4.14.4 Thin Overburden <br />Colowyo does not have a thin overburden situation as defined in Section 4.14.4 of the regulations. <br />4.14.5 Thick Overburden <br />Colovvyo does not have a thick overburden situation as defined in Section 4.14.5 of the regulations. <br />4.14.6 Re-grading or Stabilizing Rills and Gullies <br />This section will remain unchanged from the previously-approved permit document. <br />4.15 REVEGETATION REQiIII2EMENTS <br />4.15.1- 4.15.7 Revegetation Requirements, Various <br />These sections are addressed in the original permit and are currently under discussion with DRMS and <br />• CDOW. <br />4.15.8 Revegetation Success Criteria <br />The vegetation monitoring methods and statistical analyses for the demonstration of revegetation success, <br />vegetation cover, herbaceous production, and woody plant density are described in the previously <br />approved permit document Section 4.15.7 and 4.15.8. Refer to Section 2.04.10 of Volume 12 regarding <br />vegetation reference areas applicable to the South Taylor and Lower Wilson mine areas. <br />Consideration will be given to a revised species diversity standard in the context of a comprehensive <br />revegetation plan revision to be submitted by Colowyo Mine, following approval of PR-02. <br />• <br />South Taylor/Lower Wilson -Rule 4, Pa,e 25 Revision Date: 4/16/07 <br />Revision No.: PR-02 <br />