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Mountain Coal Company <br />West Elk Mine <br />Final Certification <br />Sediment Pond SG-1 <br />In accordance with Section 4.05.6 of the Rules and Regulations for coal mining administered by <br />the Colorado Division of Minerals and Geology, this certification covers the design and <br />construction of a stonmva[er sediment control pond at the West Elk Mine. This facility, known as <br />the Sediment Pond SG-1, was permitted under Permit Revision No. 07 of Mountain Coal <br />Company's Mining and Reclamation Permit No. C-80-007. <br />The undersigned, Eric W. Mende, P.E., has 17 years of design and construction experience, and <br />has been a registered professional engineer in the State of Colorado for the past 1 1 years. Mr. <br />Mende was the Project Civil Engineer responsible for overseeing the design and construction of <br />the subject pond. Mr. Mende reviewed and approved construction specifications, design drawings <br />and proposed field changes, and also performed both "in-progress" and "final" inspections of the <br />installation. <br />Certification: <br />I, Eric W. Mende, P.E., do certify that: <br />The SG-1 Sediment Pond was designed in compliance with prudent and generally accepted <br />engineering practice, and was constructed to the specifications, lines, grades, and elevations <br />required for a fully functional installation. Sediment Pond SG-l complies with the approved mine <br />plan and permit, specifically Exhibit 66 of Permit No. C-80-007, as revised. <br />January 09, 1998 <br />Eric W. Mende, P.E. <br />Colorado No. 24381 <br />