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interoffice <br />MEMORANDUM <br />to: File C-81-019 Colowyo Coal Mine, West Pit Fill Inspection Report, 2"d Quarter <br />2002 <br />from: Byron G. Walker <br />subject: Review for Compliance <br />date: October 24, 2002 <br />Rule 4.09.1(11) Inspection <br />Rule 4.09.1(1 1)(aj The fill shall be inspected for stability by a registered engineer or other <br />qualified professional specialist experienced in construction of earth and rockfll embankments <br />under the direction of a qualified professional engineer at least quarterly throughout the <br />construction and during the following critical construction periodsz: (I)removal of all organic <br />material and topsoil, (2)placement of underdrainage systems, (3) installation ofsurface drainage <br />systems, (4) placement and compaction of fill materials, and (5) revegetation. <br />The permittee is in compliance with this rule. ~ This is a quarterly report. A registered engineer <br />accomplished both the inspection and certification. Z None of the critical construction periods <br />were encountered during the time period of the report. <br />Rule 4-09.1(11)(b) The qualified registered engineer shall provide to the Division a certifted <br />report within Z weeks after each inspection that the frll has been constructed as specified in the <br />design approved by the Division. zThe report shall include a description of any appearances of <br />instability, structural weakness, and other hazardous conditions observed during the inspection. <br />A copy of the report shall be retained at the mine site- <br />The certification indicates that the inspection as accomplished on June 3Q 2002, and the report <br />was dated July 10, 2002. The inspection report was submitted to the Division under a letter of <br />July 10, 2002, and received at the Division of July 17,2002. The due date was July 14, a Sunday. <br />z The report included observations on instability, structural weakness and other (lack of) hazazds. <br />files: C-81-019 West Pit Fill Reports <br />C:\WPDOCS\Cotowyolwp fill insp rpt 2q2 rvw.doc <br />