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A statement of the professional qualifications of the certifvlne 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 Civi] Engineering in 1964 and a Master of Science Degree in Civil Engineering (major in Soils
<br />Engineering) in 1966. His peninent experience includes construction of drainages structures, impoundments
<br />for dredge spoils, and erosion control and wildlife water darns and ponds; teaching [earthwork (including
<br />hydrology and drainage) design, methods of construction, construction management, and quality convol
<br />(including soil material testing)]; review and management of desigo 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 />A citation of the Rule rmuirine the mRiFication.
<br />~ The requirement for this certification is Rule Number 4, Section 4.05.9 (10) and (11) of the Regulations of
<br />the Colorado Mined Land Reclamation Board for Coal Mining.
<br />7 !~. A specific description of the subieM of the certification.
<br />The subject of this certification is a sedimentation pond, and concerns items (a) through (e) presented above.
<br />The pond is identified as Pond Number 003 in Permit Number C-81-012. This permit is to conduct a mining
<br />operation known as the Chimney Rock Mine for the purpose o[ extracting coal, and was issued to Kaiser Steel
<br />Resources. The Chimney Rock Mine (including the subject pond) is located in Archuleta County, State of
<br />Colorado, in Township 34 North, Range 4 West, New Mexico Prime Meridian, approximately 22 miles
<br />southwest of Pagosa Springs, Colorado.
<br />This certification is limited to the maintenance and operation of the existing sedimentation pond, and is based
<br />on [he information provided in Greystone letter, October 8, 1990, Re: Sedimentation Pond Certification
<br />Chimney Rock Mine -Permit No. C-81-023, Sedimentation Pond As-Built, 5-30-91, Rev. 1, other information
<br />found in Exhibit 7 of the Permit, and the 1994 quanerly inspection reports. This certification does not extend
<br />to verification that the information in the letter, the Sedimentation Pond As-Built, and other information
<br />found in Exhibit 7 represents existing conditions in [he field, nor that the structure was designed and/or built
<br />in compliance with Rules (Sections) 4.05.2 through 4.05.9 of Colorado Mined Land Reclamation Division
<br />regulations (Permit, Section 2.05.3, Ponds. Impoundments and Diversions, page 2.05-2).
<br />A statement of the actions taken in re arln the certification.
<br />The following were reviewed: Rule Number 4, Section 4.05.9 (10) and (11) of [he Regulations of the Colorado
<br />Mined Land Reclamation Board for Coal Mining; Mined Land Reclamation Division letter July 13, 1984; the
<br />I 1993 annual certification and fourth quarterly inspection, and the 1st, 2nd and 3rd 1994 quarterly inspections
<br />(325/94, 6R3i94, 9/30/94, and 7 November 1994); permit documentation, including the Sedimentation Pond
<br />As-Built, Kaiser Steel, Chimney Rock, Pond No. 003, 5-30-91, Rev. 1; and the Dam Safety Manual (State
<br />Engineer's Office, June 3, 1983). Mr. Walker, accompanied by Mr. Dale Hockett, made a site visit and
<br />inspection on 7 November 1994. Mr. Hockett, of Elk River Construction Company, is experienced in small
<br />earthen dam (pond) construction, and made the first three 1994 quarterly inspections of Pond 003. Prior to
<br />the 1994 inspections, Mr. Hockett accompanied Mr. Walker on an inspection of the pond, and was instructed
<br />l in inspection procedures to be followed (referencing the Dam Safety Manual and standardized inspection
<br />I report forms). Measurements of selected physical parameters of the pond were made with an Abney level,
<br />Philadelphia rod, cloth tape, and compass.
<br />' Chimney Rock Mine Pond #003 inspection Report Sc Certification, IS November 1994, Page 4 of 6
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