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~ J~~f <br />~' . <br />ENERGY, INC. <br />A Su3al01ary of <br />DeterM Generallon 6 <br />Tranamlalon <br />Caopanthe <br />3607 County Ad. 65 <br />Han3sty, CO 31618 <br />Dear Dan: <br />August 4, 1999 <br />Mr. Dan Mathews <br />Division of Minerals and Geology <br />2148 Broadway. #C-5 <br />Grand Junction, Colorado 81503 <br />~l~y III IIIIIIIIIIIII III <br />999 <br />RE: Professional Certification for [he Coal Processing Waste Bank a[ the <br />Deserado Mine. <br />Permit No. C-018-81. <br />During [he second quarter of 1999, qualified persons working under my direction znd I conduced <br />a series of compliance inspections on the active coal processing waste banks located within the <br />Deserado permit area. These inspections were conducted roughly on a bi-weekly 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 refitse 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 periodic maintenance and are cleaned out as <br />conditions warrant. <br />The following maintenance work was completed since the last quarterly report: <br />I . Erosion controls along ditches and slope imprinting were maintained on sub-area 2/3- <br />4. <br />2. Armoring of both channel inlets to Refuse Pond 2/3. <br />3. Spreading and compaction of refuse on combatted sub-areas 2/3 and 4 during April. <br />Our permit requires no sub-drain system, as geotechnical investigations for the disposal site <br />revealed no groundwater present. <br />Permanent out slopes remain at approximately 85°/~ complete on [he 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 />To date, a total of 3,927,980 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 />