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I. INTRODUCTION <br />Purpose of this Document <br />This document presents the findings of compliance in support of a proposed decision of the <br />Colorado Division of Reclamation, Mining, and Safety (Division) in response to a request for <br />a Phase II and III (final) bond release on all remaining portions of the Edna Mine, Division <br />permit number C- 1980 -001. These findings and the proposed decision are made in response <br />to a request for the final release of a reclamation bond at the Edna Mine. The bond release <br />request (SL -11) was submitted to the Division by the operator of the mine, Chevron Mining, <br />Inc (previously Pittsburg & Midway Coal Mining Company) on May 14, 2009. Chevron <br />Mining, Inc. is requesting a reduction of $2,733,438.00 in the amount of bond obligation held <br />by the Division as a result of this Phase II, and III bond release request. <br />The Division conducted a permit renewal, RN6, that was approved on December 6, 2011. At <br />that time the Division evaluated the remaining reclamation liability and recalculated the amount <br />of bond required. With the approval of RN6, the reclamation liability bond was reduced by <br />$241,308.33 to $2,329,182.67. <br />Acromyms Found in this Document <br />AVF <br />alluvial valley floor <br />BRB <br />bond release blocks <br />BRU <br />bond release units <br />C <br />cover factor <br />CCR <br />Colorado Code of Regulation <br />C. R. S. <br />Colorado Revised Statutes <br />CDPHE <br />Colorado Department of Public Health and Environment <br />CDPS <br />Colorado Discharge Permit System <br />CWQCC <br />Colorado Water Quality Control Commission <br />DRMS <br />Division of Reclamation, Mining and Safety (Division) <br />FR <br />Federal Register <br />K <br />soil erodibility <br />LS <br />slope steepness <br />NRCS <br />Natural Resource Conservation Service <br />OSM <br />Office of Surface Mining <br />P <br />erosion control practice <br />PHC <br />probable hydrologic consequences <br />P &M <br />Pittsburg and Midway Coal Mining Company <br />R <br />rainfall and runoff <br />RMRS <br />Rocky Mountain Research Station <br />RN <br />Permit Renewal <br />R <br />Range <br />SL <br />bond release <br />T Township <br />TR technical revision <br />Edna Mine Page 2 April 12, 2013 <br />Phase II. and III Bond Release <br />