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<br />Mined Land Reclamation Division letter, July 13, 1984
<br />The basis for this section of this certifiption is Mined Land Reclamation Division letter, July 13, 1984, RE:
<br />Professional Certification.
<br />L!1. A statement of the professional dualifications of the certifying professional.
<br />Mr. Walker was graduated from the Colorado School of Mines with a Professional Degree in Geologipl
<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 />for 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 />~, A citation of the Rule reuuiring the certification.
<br />The requirement for this certification is Rule 4.05.9 (]0) and (11) of the Regulations of the Colorado Mined
<br />land Reclamation Board for Coal Mining.
<br />f~. A sceciric description of the subiect of the certification.
<br />The subject of this certification is sedimentation Pond Number 002 in Permit Number C-81-023, and concerns
<br />items (a) through (e) presented above. The structure is earthen embankments. Appurtenant structural
<br />elements include a primary spillway [corrugated metal pipe (CMP) trickle tube provided with a baffle plate]
<br />and an emergenry spillway (riprap-lined earth). The permit is to conduct a mining operation known as the
<br />Chimney Rock Mine for the purpose of extracting coal, and was issued to Kaiser Steel Resources (now Kaiser
<br />Ventures, Inc.). The Chimney Rock Mine (including the subject pond) is located in Archuleta County, State
<br />of 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 scope of Rule 2.05.9 (]0) and (11) as regards the existing sedimentation
<br />pond, and is based on the Sedimentation Pond As-Built, 7-7-91, Rev. 1, and other information found in Exhibit
<br />7 of the Permit. This certification does not extend to verification that the Sedimentation Pond As-Built, 7.7-
<br />91, Rev. I and other information Cound in Exhibit 7 represents existing conditions in the field, nor that the
<br />structure was designed, built, or operated in compliance with Rules 4.05.2 through 4.05.9 of Colorado Mined
<br />Land Reclamation Division regulations (Permit, Section 2.05.3, Ponds. Impoundments and Diversions, page
<br />2.05-2).
<br />!~ A statement of the actions taken in preparing the certification.
<br />The [ollowing were reviewed: Rule 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; the 1995 annual
<br />certification; permit documen[ation; the Dam Safety Manual (State Engineer's Office, June 3, 1983); 2 CCR
<br />402-1, Rules and Regulations for Dam Safety and Dam Construction. Mr. Walker made a site visit and
<br />inspection on 29 October 1996. Mr. Hockett, of Elk River Construction Company, is experienced in small
<br />earthen dam (pond) construction, and made the first three 1996 quarterly inspections of Pond 002.
<br />Measurements of selected physical parameters of the pond were made with an Abney level, Philadelphia rod,
<br />cloth tape, and compass.
<br />Chimney Rock Mine Pond #002 Certification, 3 December 1996, Page 2 of 3 Pages
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