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ENERGY, INC. <br />A Subsidiary of <br />Deteret Generation & <br />Transmission Caoperolive <br />Dear Jim: <br />April 19, 2005 <br />~ ~~ <br />Mr. Jim Stark „~~.~ <br />Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />r.~ °~ <br />RE~~~~ ~~ ~~-~ <br />APR 21 2005 <br />plyygn of Minorca ~~~~ lieola9Y <br />RE: Professional Certification for the Coal Processing Waste Bank at the <br />Deserado Mine. <br />Permit No. C-1981-018 <br />During the first quarter of 2005, 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 />the refuse piles and to satisfy the requirements of Rule 4.10.2 of the Colorado Mined Land <br />Reclamation Board. <br />INSPECTION OF ACTNE AREAS 2-3.4 and Sa <br />There aze no appazent 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 aze cleaned out as <br />conditions warrant. <br />The following maintenance work was completed since the last quarterly report: <br />1. Material stockpiled for future spreading/drying/compacting when conditions allow. <br />2. Maintained perimeter ditches. <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 90% complete on the toe of sub-azea 2-3 and 4. <br />The infill between these sub-azeas is complete. The slopes appeazed stable with some localized <br />erosion noted. <br />Refuse Area SA has progressed to the point where the drainage chazacteristics are starting to <br />evolve. The in-pit ditch on the west side is established with appropriate channel protection to <br />carry the projected runoff. <br />3607 County RD k65 <br />Rangely, CO 61648 <br />970-675-4300 <br />Fax 970-675-4399 <br />