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Summary <br />The Review Process <br />In the preceding 5 -year permit term, OMLLC has submitted 35 revisions for the Elk Creek <br />Mine permit. The 35 revisions consisted of 18 minor revisions (MR), 14 technical revisions <br />(TR), 2 permit revisions (PR) and 1 surety reduction (SR). The revisions are summarized <br />below. <br />TR -62 was submitted on April 3, 2009. OMLLC proposed to drill numerous gob vent <br />boreholes over a 3 year period to vent mine gases in six mining panels. TR -62 was withdrawn <br />on April 13, 2009. <br />MR -88 was submitted on April 6, 2009. OMLLC updated the utility borehole configuration <br />approved in TR -60. MR -88 was approved on May 13, 2009. <br />TR -63 was submitted on April 1, 2009. OMLLC proposed to install gob vent boreholes, drill <br />pads and associated light use roads for panels LW -15 and LW -16. TR -63 was approved on <br />June 15, 2009. <br />TR -64 was submitted on October 26, 2009. OMLLC proposed to install 3 gob vent boreholes, <br />drill pads and associated light use roads. TR -64 was approved on March 19, 2010. <br />TR -65 was submitted on November 29, 2009. OMLLC proposed to install 33 gob vent <br />boreholes, 27 drill pads and associated light use roads. TR -65 was approved on June 17, 2010. <br />TR -66 was submitted on January 14, 2010. OMLLC proposed to modify the procedures for <br />sealing gob vent boreholes. TR -66 was approved on March 12, 2010. <br />TR -67 was submitted on February 25, 2010. OMLLC proposed to drill 9 exploration <br />boreholes and associated light use roads. TR -67 was approved on April 28, 2010. <br />TR -68 was submitted on March 25, 2010. OMLLC proposed to install an 18 -inch steel cased <br />methane drainage borehole with an electric exhauster system by the Elk Creek fan. TR -68 was <br />approved on April 28, 2010. <br />MR -89 was submitted on May 27, 2010. OMLLC proposed to install an additional air <br />compressor building at the Elk Creek Mine facilities area. MR -89 was approved June 4, 2010. <br />TR -69 was submitted on May 27, 2010. OMLLC proposed to add 125 acres of private coal <br />and private surface to the affected area within the permit boundary. TR -69 was approved on <br />July 7, 2010. <br />MR -90 was submitted July 19, 2010. OMLLC proposed to change the location of one gob <br />vent borehole. MR -90 was approved July 28, 2010. <br />M <br />