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To [he 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-ot=the-art <br />construction practices as they relate to coal processing waste bank construction. Further, the <br />struch~res aze being constructed in compliance wish the approved design, as specified within Section <br />III-20 of the approved permit documents and depicted on Maps 76,77,82 and 83. <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 />Western Fuels-Utah Inc., Deserado Mine, located in Rio Blanco County, Colorado, are being <br />constructed incompliance with the design approved as a portion of Permit No. C-018-8 I ,issued by <br />the Colorado Division of Minerals and Geology. <br />Respectfully <br />William C. L,gpro, <br />- , =, Project Engineer <br />`:- ~~--Colorado Registered P.E. No. 30236 <br />^~- °- <br />xc: Murari Shrestha <br />Jeff Dubbert <br />File <br />