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COLORADO <br />Division of Reclamation, <br />Mining and Safety <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />January 15, 2016 <br />Sean Frisch <br />Lafarge North America, Inc. <br />8700 Bryn Mawr Ave, Suite 300 <br />Chicago IL 60631 <br />RE: Bluestone Pit; DRMS File No. M-1991-035; Corrective Action Date Extension Approval <br />Dear Mr. Frisch, <br />The Division of Reclamation, Mining and Safety has received, reviewed, and approved the <br />request for an extension of the corrective action date of the above referenced pit. The new <br />corrective action date is: <br />• Backfill area of exposed groundwater — March 30, 2016. <br />If you have any questions, please contact me at (303)866-3567 x8116. <br />Sincerely, <br />Michael A. C>i!fnningham <br />Environmental Protection Specialist <br />1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mining.state.co.us <br />John W. Hickentooper, Governor I Mike King, Executive Director I Virginia Brannon, Director <br />