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OGCC <br />7 <br />Rio Grande RECEIVED <br />Pueblo Plant <br />Via FedEx 799622023430 <br />Tim Cazier <br />Colorado Division of Reclamation, Mining and Safety <br />Department of Natural Resources <br />1313 Sherman St. Room 215 <br />Denver, Colorado 80203 <br />MAY 01 2013 <br />DIVISION OF RECLAMATION <br />MINING AND SAFETY <br />RE: Regular 112 Operations Mining Permit No. M- 2002 -004 <br />GCC Rio Grande, Inc. — Red Rock Plant and Limestone Mine, Pueblo, Colorado <br />Application for Technical Revision No. 4 <br />Dear Mr. Cazier: <br />GCC Rio Grande, Inc. (GCC) hereby requests the Division's approval of the enclosed technical revisions to <br />Mining Permit No. M- 2002 -004. GCC's check in the amount of $216 is enclosed to cover the Technical <br />Revision fee. <br />April 26, 2013 <br />The purpose of this application for Technical Revision 4 is to update the Mining Plan to reflect mining panel <br />boundaries and conveyor locations. <br />This submission consists of: <br />• Revised Exhibit D. A new Exhibit D is enclosed as well as a mark -up version showing revised and <br />deleted text. <br />• Revised Exhibit C -2.5 showing the location of the mine facilities. <br />This Technical Revision application contains no changes to the permit boundary, to the reclamation plan, to <br />the financial warranty, or to the affected area. <br />In summary, the revisions consist of the following: <br />• Updates to text to indicate that initial mining activities have been completed. <br />• Removal of references to mining into the Codell sandstone. GCC has determined that it will not use <br />this material in its cement manufacturing process. <br />• Updates to show the mining plan extending into Phase II. <br />• Updates to include the revisions approved in Technical Revision 2 (increased limestone and cement <br />production; increased active quarrying acreage). <br />• Addition of use of tire- derived fuel to supplement the use of coal to produce Portland cement clinker <br />(as allowed in Modification No. 5 of GCC's air permit issued on July 9, 2012). <br />GCC Rio Grande, Inc. • Pueblo Plant <br />3372 Lime Road • Pueblo, CO 81004 <br />(719) 647 -6800 • Fax (719) 647 -6899 <br />