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n' <br />Three compaction tests were performed on sub-area 2/3/4 each month during [he quarter. All <br />areas tested exceeded the required Proctor level of 90%. <br />The topsoil and subsoil piles for sub-areas I, 2-3, 4 and Sa have been seeded and are stable. <br />Vegetative growth appears adequate to control erosion on [he piles. <br />Quarterly monitoring of RP-4 refuse pond embankment has continued, and to date appears to be <br />stable. <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 lI1.B.3 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 />1 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 />t2espectfully, <br />~1\~~qq_ <br />= ~. =- ~ti <br />~',.kVilliam C~Lepro, P.E. <br />--.1^ Project Engineer <br />Colorado Registered P.E. No. 30263 <br />xc: Jeff Dubbert <br />Scott Wanstedt <br />File <br />