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STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Departrnenl of Natural Resources <br />1313 Sherman St., Raom 215 <br />Denver, Colorado 80203 <br />Phone: (303) 86fr3567 <br />FAX: (303) 832A706 <br />COLORADO <br />DIVISION O F <br />MINERALS <br />GEOLOGY <br />RECEANATION•NINING <br />SAFFTT•SCIFNCE <br />Interoffice MEMORANDUM BItl Dwem <br />Governor <br />to: C-1982-056, Coal Refuse Pile spection Report E <br />from: Byron G. Walker RGGaIdN,.~r,y <br />subject: Review of 4th Quarter 2005 Refuse Pile Inspection Report, Foidel CreekDlv~laFs;l <br />1982-056 NaNrat Resource rnWee <br />date: January 17, 2006 <br />Table of Contents <br />Table of Contents ......................................................................... .................................................. l <br />Rule 4.09.1(11)(a) ........................................................................ ..................................................1 <br />Rule 4.09.1(11)(c) ........................................................................ ..................................................2 <br />Rule 4.10.1(1) .............................................................................. ..................................................2 <br />Rule 4.10.1(1)(b) .......................................................................... ..................................................2 <br />Rule 4.10.2(1) .............................................................................. ..................................................2 <br />Rule 4.10.2(2)(a) .......................................................................... ..................................................2 <br />Rule 4.10.2(2)(b) .......................................................................... ..................................................2 <br />Rule 4.10.2(2)(c) .......................................................................... ..................................................3 <br />Rule 4.10.2(2)(d) .......................................................................... ..................................................3 <br />Rule 4.10.2(3) .............................................................................. ..................................................3 <br />CDMG Policy Memorandum, 7/13/84 ......................................... ..................................................3 <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 rockf:ll embankments <br />under the direction of a qualified professional engineer at least quarterly throughout the <br />construction and during the following critical construction periods: (!)removal of all organic <br />material and topsoil, (2)placement of underdrainage systems, (3) installation of surface drainage <br />systems, (~) placement and compaction offill materials, and (5) revegetation. <br />The subject inspection was a quarterly inspection accomplished throughout construction, not one <br />of the critical construction periods. A registered engineer signed the report. <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 fill has been constructed as specified in the <br />design approved by the Division. The 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 />Office of Office of Colorado <br />Mined Land RE.rlamation Active and Inactive Mines Geological Survey <br />