Laserfiche WebLink
DEC 191986 <br /> Date: December 18, 1986 <br /> To : Doug Bowman MINED Lmj4u <br /> From: Scott Jones <br /> 2ECL.AMATION DIVISION <br /> Subject : Inspection of Coal Basin Refuse Piles and Rock Tunnel <br /> Waste Pile. <br /> On December 11 . 1986 an inspection was made of the Mid- <br /> Continent Resources Sutey Refuse Pile, Old Refuse Pile and Rock <br /> Tunnel Waste Pile. The investigation was made by myself, a <br /> Registered Professional Engineer in the State of Colorado. I <br /> have had over five years of experience in the design, construct- <br /> ion and operation of waste refuse piles . <br /> The purpose of this inspection was to ensure that the waste <br /> piles were being constructed according to the approved design <br /> and the requirements of Rules 4. 9 and 4. 10 of the Colorado Mined <br /> Land Reclamation Board and 30 CFR 77 . 215 of the Mine Health and <br /> Safety Administration. The inspection included observations of <br /> structural stability, compaction procedures and hydrologic <br /> control . <br /> Sutey Coal Waste Facility <br /> At the time of the inspection the Sutey Pile was receiving <br /> coal waste from the preparation plant . The refuse was being <br /> spread in lifts less than two feet in thickness. The continual <br /> movement of the dozer appeared to adequately compact the mater- <br /> ial . <br /> On September 26 there was an erosional failure on the south <br /> outslope of the pile. The attached report details the failure and <br /> steps which need, to be taken to ensure that this type of failure <br /> does not occur again . <br /> It appears that the steps already taken to fix the failure <br /> area are working very well . The area that failed has shown no <br /> signs of further movement since the date of the original failure. <br /> An examination of the rest of the pile indicated that there <br /> were no structural defects noticeable. Likewise, there was no <br /> ponding of water and it appears that snow from recent storms has <br /> been removed prior to compaction of the refuse. <br /> Rock Tunnel Waste Disposal Facility <br /> At the time of inspection the waste disposal facility was <br /> receiving rock from the tunnel development . Rock from the tunnel <br /> was being transported to the dumping site by rubber-tired <br /> trucks . Each truck carries 15 to 25 tons of rock. The pile is <br /> being constructed so that the trucks run over material that has <br /> already been dumped. A D-8 Dozer was spreading the piles of rock <br /> dumped by the trucks in lifts less than two feet in thickness . <br />