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The basis for this section of this certification is Mined Land Reclamation Division letter, July 13, 1984, RE: <br />Professional Certification. <br />) l) A statement of the professional qualifications of the certifrine professional. <br />Mr. Walker was graduated from the Colorado School of Mines with a Professional Degree in Geological <br />Engineering in 1959, and from the Missouri School of Mines at Rolla with a Bachelor of Science Degree <br />Equivalent in Civil Engineering in 1964 and a Master of Science Degree in Civil Engineering (major in Soils <br />Engineering) in 1966. His pertinent experience includes construction of drainages structures, impoundments <br />[or dredge spoils, and erosion control and wildlife water dams and ponds; teaching [earthwork (including <br />hydrology and drainage) design, methods of construction, construction management, and quality control <br />(including soil material testing)]; review and management of design and construction of dredge spoil <br />containment structures (impoundments); and inspection of sedimentation dams for safety, stability, and <br />operational effectiveness. He is a registered Professional Engineer in the States of Colorado and Missouri. <br />1~. A citation of the Rule requiring the certification. <br />The requirements for this certification are Rules 4.05.9 (10) and (11) of the Regulations of the Colorado <br />Mined Land Reclamation Board for Coal Mining. <br />1~. A specitlc description of the subject of the certification. <br />The subject of this etnification is a sedimentation pond, and concerns items (a) through (e) presented above. <br />The struMure is an earth embankment. Appurtenant structural elements include a primary spillway <br />[corrugated metal pipe (CMP) trickle tube provided with a steel box riser with baffle boards] and an emergency <br />spillway (earth). The pond is identified as Pond Number 001 in Permit Number C-81-026. This permit is to <br />conduct a mining operation known as the Canadian Strip Mine for the purpose of extracting coal, and was <br />issued to SLURCO Corporation (current). The Canadian Strip Mine (including the subject pond) is located <br />in Jackson County, State of Colorado, in Township 8 North, Range 78 West, 6th Prime Meridian, <br />approximately 9 miles west of Walden, Colorado. <br />This certification is limited [o [he scope of Rules 2.05.9 (10) and (11) as regards the existing sedimentation <br />pond, and is based on the Pond 1 Dam Cross Section and other in[ormation provided on [he Mining and <br />Reclamation Plan, Figure 2, dated Mar. 30, 1981; Stage-Storage Curve Sedimentation Pond #1, Figure Q-3, <br />dated 1129N4. This certification does not extend to verification that this information and other information <br />found in the Permit represents existing conditions in the field, nor that the structure was designed, built, or <br />operated in compliance with Rules 4.05.2 through 4.05.9 of Colorado Mined Land Reclamation Division <br />regulations. <br />A statement o[ the actions taken in preparing the certificption. <br />The following were reviewed: Rules 4.05.9 (10) and (11) of the Regulations of the Colorado Mined Land <br />Reclamation Board for Coal Mining; Mined Land Reclamation Division letter July 13, 1984, Re: Professional <br />Certification; the 4th quarter 1995 inspection report and 1995 annual certification; [he 1996 quarterly <br />inspection reports; permit documentation including the Mining and Reclamation Plan, Figure 2, dated Mar. <br />30, 1981, and the Stage-Storage Curve Sedimentation Pond #l, Figure Q-3, dated 11/291994; the Dam Safety <br />Manual (State Engineer's Office, June 3, 1983); and CCR 402-1, Rules and Regulations for Dam Safety and <br />Dam Construction. Measurements of selected physical parameters of the pond were made with an Abney <br />level, cloth tape, and compass. <br />Canadian Strip Mine Pond #1 Certification, 1 November 1996, Page 2 of 3 <br />