HYDRO26779

• Permit No: C1981026
• IBM Index Class Name: Hydrology
• Doc Date: 11/1/1996
• Doc Name: 1996 ANNUAL CERTIFICATIONS
• Permit Index Doc Type: Prof Pond Certifications
• Media Type: D
• Archive: No

The basis for this section of this certification is Mined Land Reclamation Division letter, July 13, 1984, RE:
Professional Certification.
f i~ A statement of the oro[essional qualifications of the certifvine professional.
Mr. Walker was graduated from the Colorado School of Mines with a Professional Degree in Geological
Engineering in 1959, and from the Missouri School of Mines at Rolla with a Bachelor of Science Degree
Equivalent in Civil Engineering in 1964 and a Master of Science Degree in Civil Engineering (major in Soils
Engineering) in 1966. His pertinent experience includes construction of drainages structures, impoundments
for dredge spoils, and erosion control and wildlife water dams and ponds; teaching [earthwork (including
hydrology and drainage) design, methods of construction, construction management, and quality control
(including soil material testing)]; review and management of design and construction of dredge spoil
containment structures (impoundments); and inspection of sedimentation dams for safety, stability, and
operational effectiveness. He is a registered Professional Engineer in the States of Colorado and Missouri.
f~ A citation of the Rule tegulring the certification.
The requirements for this certification are Rules 4.05.9 (10) and (11) of the Regulations of the Colorado
Mined Land Reclamation Board for Coal Mining.
j3Z A specific description of the subject of the certification.
The subject of this certification is a sedimentation pond, and concerns items (a) through (e) presented above.
The structure is an earth embankment. Appurtenant structural elements include a primary spillway
[corrugated metal pipe (CMP) riser and barrel] and an emergency spillway (riprap-lined earth). The pond is
identified as Pond Number 2 in Permit Number C-81-026. This permit is to conduct a mining operation
known as the Canadian Strip Mine for the purpose of extracting coal, and was issued to SLURCO Corporation
(current). The Canadian Strip Mine (including the subject pond) is located in Jackson County, State of
Colorado, in Township 8 North, Range 78 West, 6th Prime Meridian, approximately 9 miles west of Walden,
Colorado.
This certification is limited to the scope of Rules 4.05.9 (10) and (11) as regards the existing sedimentation
pond, and is based on documentation of the Permit identified in paragraph (4) below. This certification does
not extend to verification that this information and other information found in the Permit represents existing
conditions in the field, nor that the structure was designed, built, or operated in compliance with Rules 4.05.2
through 4.05.9 of Colorado Mined land Reclamation Division regulations.
1~ A statement of the actions taken in preparing the certification.
The following were reviewed: Rules 4.05.9 (10) and (11) of [he Regulations of the Colorado Mined Land
Reclamation Board for Coal Mining; Mined Land Reclamation Division letter July 13, 1984, Re: Professional
Certification; the 4th quarter 1995 inspection report and 1995 annual certification; the 1996 quarterly
inspection reports; the Pond 2 Dam Cross Section and other information provided on Figure 3, Reclamation
Project As-Built Topography, dated 11/10/87; Figure Q-4, Stage-Volume Analysis Sedimentation Pond #2,
dated 1129P994; Appendix Q, pages Q-1 and Q-2, revised 11/30/94; SEDCAD+ Elevation-Area-Capacity-
Discharge Table, 1994 Pond 002 As-Built Hydraulics, 22-29-1994; the Dam Safety Manual (State Engineer's
Office, June 3, 1983); and 2 CCR 402-1, Rules and Regulations for Dam Safety and Dam Construction.
Measurements of selected physical parameters of the pond were made with an Abney level, tape, and compass.
Canadian Strip Mine Pond #2 Certification, 1 November 1996, Page 2 of 3