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Page 2 of 6 <br /> Midterm Review (MT6) <br /> Yoast Mine <br /> C1994082 <br /> This document presents the results of Midterm Permit Review MT6 of the Seneca Property, LLC.'s (SPL), <br /> Yoast Mine. The Colorado Division of Reclamation, Mining and Safety (The Division), conducted this review <br /> for the purpose of fulfilling the requirements of the Colorado Surface Coal Mining Reclamation Act and the <br /> Regulations of the Colorado Mined Land Reclamation Board for Coal Mining. Detailed information about the <br /> review process can be found in the Act and the Regulations of the Colorado Mined Land Reclamation Board for <br /> Coal Mining. All Rules referenced within this document are contained within the Regulations and in the <br /> Guidelines Regarding Selected Coal Mine Bond Release Issues, dated April 18, 1995. All "Sections" <br /> referenced within this document are contained within the Regulations, unless otherwise noted. Detailed <br /> information about the mining and reclamation operations at SPL are available in the Yoast Mine Permit <br /> Application Package, accessible on the Division web site: https:Hdrms.colorado.gov/data-search <br /> This Midterm Review was conducted to fulfill the requirements of Sections 2.08.3, 2.06.2(10), <br /> 2.06.3(4)(a), 2.06.5(3), 2.06.7(5) and 3.02.2(4). <br /> Section 2.08.3 of the Regulations requires that the Division conduct a review of each permit <br /> issued, prior to its midterm. Based on this review, for good cause shown, the Division may <br /> require reasonable revisions or modifications of the permit provisions to ensure compliance with <br /> the Act and Regulation. <br /> Section 3.02.2(4)requires that the Division review the amount of the bond and the terms of <br /> acceptance of the bond every 2 '/2 years. <br /> Sections 2.06.2(10), 2.06.3(4)(a), 2.06.5(3) and 2.06.7(5) require that experimental practices, <br /> mountaintop removal variances, variances from approximate original contour(AOC)for steep <br /> slope mining and variances from contemporaneous reclamation for combined surface and <br /> underground mining, respectively, be reviewed by the Division where applicable during the <br /> Midterm Review. <br /> This Midterm Review consisted of a detailed review of the following document: <br /> • The Yoast Mine permit application, including stipulations and responses <br /> • All revisions made to the permit since the issuance of the permit <br /> • The Yoast Mine annual reclamation and hydrology reports <br /> • Bond surety and reclamation cost estimate <br /> • The Division findings documents <br /> • The Division's inspection reports <br /> • Any notices of violations since the issuance of the permit <br /> SECTION I - HISTORY <br /> Operations <br /> The Yoast Mine is a surface coal mining operation located in Routt County, approximately seven <br /> miles South Southeast of the town of Hayden. The mine is one of two surface mines operated <br /> by SPL, with Yoast situated aerially between the Peabody Sage Creek and Seneca II West <br />