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~~p~ III IIIIIIIIIIIIIIII <br />999 <br />ENERGY, INC. <br />A 9ubel0lery of <br />Deeerel Gansretlon 8 <br />Trenemlolon <br />Coopen[he <br />3607 Caunry Ad. 65 <br />Renpery, CO 616/6 <br />970.675-6437 <br />Fu 970.675.5229 <br />Dear Dan: <br />May 4, 1998 <br />Mr. Dan Mathews <br />Division of Minerals and Geology <br />2148 Broadway, #C-5 <br />Grand Junction, Colorado 81503 <br />RE: Professional Certification for the Coal Processing Waste Bank at the <br />Deserado Mine Property, Bonanza Power Project. <br />File No. C-018-81. <br />During the first quarter of 1998, myself and qualified persons working under my direction <br />conducted a series of compliance inspections on the active coal processing waste banks located <br />within the Deserado permit area. These inspections were conducted roughly on a bi-weekly <br />basis. <br />1 am a professional engineer registered in the State of Colorado and my experience fulfills the <br />requirements of the Colorado Surface Coal Mining Reclamation Act. <br />The purpose of these inspections and subsequent certification is to ensure proper construction of <br />the refuse piles and to satisfy the requirements of Rule 4.10.2 of the Colorado Mined Land <br />Reclamation Board. <br />INSPECTION OF ACTIVE AREAS 2-3. 4 and Sa <br />There are no apparent points of seepage, or indications of slope failure on the active piles. The <br />surface drainage facilities were adequately maintained and were working properly to convey <br />surface runoff. Sediment control structures need general attention and will be cleaned out as <br />conditions allow. <br />The following maintenance work was completed since the last quarterly report: <br />I. Erosion controls along ditches and slope imprinting were completed in sub-area 4 <br />(TR-39) <br />Sub-area Sa has not been actively worked and or compacted during this quarter <br />Our permit requires no sub-drain system, as geotechnical investigations for [he disposal site <br />revealed no groundwater present. <br />Permanent out slopes remain at approximately 8~% complete on the toe of sub-area 2-3 and <br />approximately 55% complete on [he toe of sub-area 4. These slopes appeared stable. Pit 5 <br />consists of a thin layer of refuse over the entire area. <br />The groundwater monitoring well installed between sub-areas I and 2-3 has remained dry [o date <br />