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1. Introduction <br />This document is the decision (Decision) package prepared by the Colorado Division of <br />Reclamation, Mining and Safety (the Division) for the revision of an existing permit for the <br />Colowyo Coal Mine (Mine). This document updates previous findings documents and includes: <br />1) the proposed decision to the Permit Revision Number 4 application; 2) a summary, which <br />includes a history of the revision application, a description of the environment affected by the <br />operation, and a description of the mining and reclamation plan; and 3) the written findings of <br />compliance the Division has made as required by the Colorado Surface Coal Mining <br />Reclamation Act. Detailed information concerning the findings of compliance can be found in <br />the Regulations of the Colorado Mined Land Reclamation Board for Coal Mining (Rules). <br />The Division received an application for Permit Revision Number 4 (PR -04) to conduct surface <br />coal mining and reclamation operations on March 17, 2015. The Colowyo Coal Company L.P. <br />(CCC or Colowyo) operates the Mine and submitted the application. The Mine is located on <br />federal, state and private lands within Moffat and Rio Blanco Counties, Colorado. Operations at <br />the Mine were first permitted in 1976 under Colorado Mined Land Reclamation Division <br />(CMLRD) Extraction and Development Permit 76-15 C/A, and have continued without cessation <br />to the present. <br />1.1 Acronyms and Abbreviations <br />AOC <br />approximate original contour <br />Applicant <br />see Colowyo <br />Application <br />The application for PR -04 to Permit C-1981-019, unless otherwise <br />specified <br />ARR <br />Annual Reclamation Report <br />AVS <br />Applicant/Violator System <br />BLM <br />Bureau of Land Management <br />CCC <br />Colowyo Coal Company L.P. <br />CDPHE <br />Colorado Department of Public Health and Environment <br />CDPS <br />Colorado Discharge Permit System <br />CDWR <br />Colorado Division of Water Resources <br />CFR <br />Code of Federal Regulations <br />CHIA <br />Cumulative Hydrologic Impact Assessment <br />CMLRD <br />Colorado Mined Land Reclamation Division <br />CPW Colorado Parks and Wildlife <br />Colowyo Colowyo Coal Company L.P. <br />Decision The decision (proposed) concerning this application for revision of an <br />PR -04, Colowyo Coal Mine C1981-019 1 August 2016 <br />