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;. <br />ENERGY, INC. <br />A SuOslAlsry of <br />DeseretDeneretlon 8 <br />Trsnsmlalon <br />Coopsretire <br />3607 County Ad. 66 <br />NaaBety,C0 11648 <br />Dear Dan: <br />November 4, 1999 <br />Mr. Dan Mathews <br />Division of Mineralsand Geology <br />2148 Broadway, #C-5 <br />Grand Junction, Colorado 81503 <br />~sy III IIIIIIIIIIIIIIII <br />999 <br />RE: Professional Certification for the Coal Processing Waste Bank at the <br />Deserado Mine. <br />Permit No. C-018-81. <br />During the third quarter of 1999, qualified persons working under my direction and I conducted a <br />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 />I 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 />[he refuse piles and to satisfy [he requirements of Rule 4.10.2 of [he Colorado Mined Land <br />Reclamation Board. <br />INSPECTION OF ACTIVE AREAS 2-3, 4 and Sa <br />There are tto 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 />Ttte 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. Spreading and compaction of refuse on combined sub-areas 2/3 artd 4. <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 the toe of sttb-area 2-3 and <br />approximately 55% complete on the 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 3,558,770 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 />