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Oxbow Mining, LLC <br />Permit No. 98GUO812 - <br />Initial ADDroval — Modification 6 <br />Permit History <br />Colorado Department of Public Health and Environment <br />Air Pollution Control Division <br />Issuance <br />Date <br />Description <br />Initial Approval -Mod 6 <br />This Issuance <br />Increase in daily production limit from 36,000 tons to 40,000 tons per day. <br />Final Approval -Mod 5 <br />July 16, 2009 <br />Administrative correction for fugitive emissions and engine serial number <br />Initial Approval -Mod 5 <br />Issued April 4, <br />Engine for Screen under AIRS 031 (Screen 3) replaced Sept. 25, 2006. NOx <br />2009 <br />emissions are reduced from 14.80 tons per year to 1.38 tons per year <br />Final Approval -Mod 4 <br />Issued Aug. 29, <br />Portable Screen (SCREEN 3), permitted under 03PO1037 (AIRS: <br />2008. <br />(777/2223/001) is included in this permit as a Stationary Source and the <br />emission limits are added to the facility permit. <br />Name Change <br />From Oxbow Mining, Inc to Oxbow Mining, LLC. <br />Modification #3: <br />Issued January <br />Increasing production limit from 6,000,000 tons per year (increasing other <br />7, 2005 <br />limits accordingly) <br />Modification #2 Re- <br />Corrections to screening throughput limits <br />issue: <br />Modification #2: <br />Closing Sanborn Creek Mine, Increasing production from the Elk Creek <br />Mine (increasing production limits from 28,000 tons per day and 4,800,000 <br />tons per year). <br />Modification: <br />increasing coal hauling from 1200 tons per day, increasing bulldozing from <br />24 dozer hours per day, adding waste rock crusher <br />Final Approval <br />issued <br />Modification #2 Re- <br />September 22, <br />issue <br />2003 <br />Final Approval <br />issued <br />Modification #2 <br />September 12, <br />2003 <br />Final Approval Name <br />issued April 12, <br />Change <br />2002 <br />Final Approval and <br />issued August <br />modification <br />10, 2001 <br />Initial Approval issued <br />August 18, 1999 <br />051/0007/999 Page 9 <br />