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<br /> <br />combination of these pits began following [he completion of the sedinten[ pond enlargements and <br />runoff diversion channel construction. Pit ~ consists of a thin layer of refuse over the entire area. <br />The groundwater monitoring well installed between sub-areas 1 and 2-3 has remained dry to date. <br />To date, a total of 3,824,109 tons of refuse have been placed in the 2/3/4 combined sub-area and a <br />total of 417,829 tons of refuse have been placed in sub-area Sa. <br />Ten compaction tests were performed on sub-area 2/3/4 and two tests were performed on sub-area <br />Sa. All areas tested exceeded the required Proctor level of 90%. <br />The topsoil and subsoil piles for sub-areas 1, 2-3, 4 and Sa have been seeded and are stable with <br />the exception of subsoil pile Sa. This pile received additional material from the enlargement of <br />Pond 2/3 and will be seeded this fall. Vegetative grow[It appears adequate to control erosion on <br />the remainder of the piles. <br />Quarterly monitoring of RP-4 refuse pond embankment has continued, and to date appears [o 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 tfte 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" Colora'd • rvision of Minerals and Geology. <br />;G;,S <br />'~~ :n <br />Respectfully~o <br />W•„'~t <br />n.e :)~ !~ <br />//J^ l <br />Lam(/ ^`.., './`; <br />William C,L:epro, P.E. <br />Project Engineer <br />Colorado Registered P.E. No. 30263 <br />xc: Murari Shres(ha <br />Jeff Dubbert <br />Scott Wanstedt <br />File <br />