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STATE OF COLORADO <br />DIVISION OF RECLAMATION, MINING AND SAFETY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 COLOR A DO <br /> <br />Phone: (303) 866-3567 D I V I S I ON Of <br />RECLAMATION <br />FAX: (303) 832-8106 MINING <br />January 25, 2010 SAFETY <br />Jerry Nettleton <br /> Bill Ritter, Jr. <br />Twentymile Coal Co. Governor <br />29515 Routt County Road No. 27 Harris D. Sherman <br />Oak Creek, CO 80467 Executive Director <br /> Ronald W. Cattany <br /> Division Director <br />Re: Foidel Creek Mine, C-82-056, Fourth Quarter 2009 Coal Waste Pile Inspection Report Natural Resource Trustee <br />Dear Mr. Nettleton: <br />The Division received Twentymile Coal Company's (TCC) Fourth Quarter 2009 Coal Waste Pile Inspection <br />Report on January 11, 2010, via e-mail. The report was prepared by North West Colorado Consultants <br />(NWCC) for Twentymile Coal Company. Compaction tests were conducted on December 4, 2009. <br />NWCC visited the site on December 29, 2009 and conducted an inspection of the refuse disposal area (RDA). <br />No problems were noted in the engineer's report with regard to the construction, grading, drainage, or <br />operation of the pile. Based upon TCC's reported throughput of coal through the wash plant, the engineer <br />approximated that 154,616 to 173,943 tons of coal refuse was added to the RDA during fourth quarter 2009. <br />TCC provided Nuclear Density Test results in the report as well. Compaction specifications were achieved <br />for all 7 sample locations. TCC provided a map of the refuse area and compaction test locations with this <br />report. <br />Results of monitoring of 5 piezometers were included in the report. Water levels reported for 4 of the 5 <br />piezometers remain consistent with previously reported trends. The piezometer 5MW has been damaged and <br />no measurement was recorded. With approval of the proposed expansion of the RDA to the east, additional <br />piezometers have been approved to be constructed with the development of the RDA expansion. <br />TCC began access road construction and topsoil salvage for the RDA expansion in December 2009. Please <br />assure that all inspections and documentation required by Rules 4.10.2, and 4.09.1(11) are conducted and <br />recorded for the RDA expansion. <br />This report complies with Rules 4.10.2 and 4.09.1(11)(a), and Rule 4.09.1(11)(b). <br />Janet <br />Protection Specialist II <br />3!93)-8'66-3567 ext. 8107 <br />C:\jhb\C82056\reports\2009\46` Q.doc <br />Office of Office of <br />Mined Land Reclamation Denver • Grand Junction • Durango Active and Inactive Mines