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interoffice <br />MEMORANDUM <br />to: File C-81-019 Colowyo oal Mine, West Pit Fill Inspection Report, ls` Quarter <br />2003 <br />from: Byron G. Wilke <br />subject: Review for Compliance <br />date: July 23, 2003 <br />Rule 4.09.1(11) Inspection <br />Rule 4.09.1(11)(a) The fill shall be inspected for stability by a registered engineer or other <br />qualified professional specialist experienced in construction of earth and rockfill embankments <br />under the direction of a qualified professional engineer at least quarterly throughout the <br />construction and during the following critical construction periodsZ: (])removal of all organic <br />material and topsoil, (2)placement of underdrainage systems, (3) installation ofsurface drainage <br />systems, (4) placement and compaction offill 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 <br />Rule 4.09.1(11)(b) The qualifted registered engineer shall provide to the Division a certified <br />report within 2 weeks after each inspection that the fall has been constructed as specified in the <br />design approved by the Division. 2The 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 fill was inspected on March 31, 2003. Thus the report was due <br />April 14, 2003. The report was dated April 11, 2003 and received at the Division on April 14, <br />2003. z The report included (indirectly) observations on instability, structural weakness and other <br />(lack of) hazazds. <br />files: C-81-019 West Pi[ Fili Reports <br />C:\WPDOCS\Colowyo\wp fill insp rpt lq3 rvw.doc <br />