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Water & Earth Technologies, Inc. <br />Walar Rasowws and 6wiromwikl ConsuNinp <br /> <br />August 9, 2005 <br />Mr. Michael A. Berdine <br />Manager of Tech Services <br />Twentymile Coal Company <br />29515 Route County Road #27 <br />Oak Creek, Colorado 80467 <br />RE: Revised SEDCAD Modeling and Design Reports for Intake Shaft Facility Drainage and Sediment <br />Control System Design <br />Dear Mr. Berdine: <br />Enclosed is the revised report (with report signature page showing original signature and date as required <br />by the State of Colorado for the Professional Engineer Design Certifications). I have also transmited via <br />email a copy of the revised certification report and SEDCAD output reports. <br />Again, thank you for this opportunity to provide engineering design services to Peabody Energy <br />Twentymile Coal Company. Please call me or Rob Niedenzu if you have any questions regarding the <br />email transmittal or the enclosed information. <br />Sincerely, <br />Water & arth Tec nolo ~es, Inc. <br />Richard S offs, P,~~~%~~ <br />P <br />President <br />Principal Engineer/Hydrologist <br />Enclosures <br />cc: A155 Project File <br />R. Niedenzu w/o enclosures <br />.J <br />1225 Red Cedar Circle, Suite A • Fort Collins, Colorado, USA • 80524 <br />tom: (mo) YLSd080 • fm: (vso1225ewo . EmaB:irdcOwatirand.onl,.mm . W.b sN.: Map://woi.r<~d+ae~.com <br />