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~~I I~~I~~'I~II~~ ~I~ <br />., <br />- COLORADO WESTMORELAND iN'C, 999 <br />COLORADO P+INED LAND RECLAMATION BOARD CPRTIFICATIO~' <br />OR f, HARD VALLEY WEST MINE PO NO <br />PROFESSIONAL QUALIFICATIONS <br />Matthew S, Sakurada graduated from Colorado State university with a Bachelor of <br />Science-Civil Engineering in 197x, He also graduated from the 1niversity of <br />Colorado with a Master of Enyineeriny deyree in 1~7g, He has been a profession- <br />al engineer in the State of Colorado since 1978, He has experience and knowl- <br />edge in the design and construction of dams, drainage control , hydrology, and <br />structures, He is also experienced in permitting of coal mine facilities and <br />permit compliance, <br />RULE REQUIRING CERTIFICATION <br />This certification is required by Rule 4,05,6(7) of the Regulations of the Colo- <br />rado Mined Land keclamation Soard for Coal Mining. <br />SI~RJECT OF CERTIFICATION <br />This certification is for the (`rchard Valley 4~ast Mine sedimentation pond, <br />ACTIONS TAKEN TO PREPARE CERTIFICATION <br />The desiyn of the pond was completed by Graeme Major, P, F, of (;older Associates, <br />Calculations were completed ny f;raeme Major on the stability, spillway capacity <br />and volume of the dam as required by CMLRD rules, <br />Laboratory tests were taken to classify soils in the area and complete a Proctor <br />test for compaction purposes, <br />Field on-site inspections were completed daily from November 13, 198F, through <br />January 16, 1987, Compaction, culvert installation, and other field construc- <br />tion was inspected and documented, <br />The construction followed the documents submitted in pe rniit application Hf.-83- <br />038 to the Colorado Mined Land Reclamation Division, <br />Matthew S, Sakurada consulted with fraeme Major, P,E„ designer of the sedimen- <br />tation dam, <br />PROFESSIONAL OBSERVATIONS AND CONCLUSIONS <br />Compaction was completed using portable "jumping jacks" as specified in 4- to fl- <br />inch layers, The culvert was constructed per manufacturer's recommendations. <br />Final inspection shows no instabilities, leakage or adverse envirornnental conse- <br />quences, <br />The pond volume was surveyed by Jesse Messenger, PLS, Clean-out and storage <br />levels were marked by f,W1 personnel, <br />