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r <br />To the best of my knowledge, based on my professional expertise, the permanent refuse structures <br />at the Deserado mine are being constructed in conformance with the prudent state-of--the-art <br />construction practices as they relate to coal processing waste bank construction. Further, the <br />structures are being constructed in compliance with the approved design, as specified within <br />Section III-20 of the approved permit documents and depicted on Maps 76,77,82 and 83 and <br />other permit documents or maps as amended from time to time. <br />I certify, based on my field observations and those observations of my qualified designates and <br />professional investigations, as detailed above, that the permanent refuse disposal structures at <br />Blue Mountain Energy, Inc., Deserado Mine, located in Rio Blanco County, Colorado, are being <br />constructed in compliance with the design approved as a portion of Permit No. C-018-81, issued <br />by the Colorado Division of Minerals and Geology. <br />-. ReL spectfully, <br />_Willia~iLC. Lepro, P.E. <br />_ ~ ; ~ ~)'roject-engineer <br />~'-. Col'oia~o Registered P.E. No. 30263 <br />~-''~.....r=. <br />~~~"'~--~~xc`Murari Shrestha <br />Jeff Dubbert <br />File <br />