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k'q KI-FINrt-t I)F R <br />February 13, 2008 <br />Project No. 86995 <br />Mr. Matthew Hall, P.E. <br />Aggregate Industries <br />West Central Region <br />1707 Cole Blvd., Suite 100 <br />Golden, CO 80401 <br />RE: Geotechnical Stability Exhibit Lyons Quarry, Boulder County <br />Colorado, Reporting Period through December 16, 2007 <br />Dear Mr. Hall: <br />Kleinfelder is pleased to present the enclosed Summary Report of Engineering <br />Stability Analysis for the Lyons Quarry. The report is being submitted as part of <br />the Geotechnical Stability Exhibit in accordance with the rules and regulations of <br />the Colorado Mined Land Reclamation Board. The Summary Report documents <br />the results of our field investigations, laboratory testing, and engineering <br />analyses performed to support the planned reclamation of the Lyons Quarry. <br />We appreciate this opportunity to be of service and we look forward to any <br />opportunity to work with you again in the future. If you have any questions <br />regarding this report or need additional information or services, please contact <br />our office. <br />Sincerely, <br />KLEINFELDER WEST, INC. <br />John P. Ballegeer, P.E., P.G. <br />Project Manager <br />J P B/tre <br />86995/DEN8T002 1 February 13, 2008 <br />Copyright 2008 Kleinfelder West, Inc. <br />