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<br />HALL-=RWIN <br />C O R P O R A T I O N <br />301 Centennial Drive, Milliken, CO 80543 Phone: (970) 352-6057 Fax: (970) 352-6284 <br />In support of the above referenced request, attached please find: <br />• March 9, 2007 letter to Carl Mount, DRMS, regarding Technical Revision 3, from <br />Civil Resources, LLC. <br />• April 20, 2007 letter to Mark Campbell, SW Chambers, LLC, regarding Approval of <br />Technical Revision 3, from Allen C. Sorenson, DRMS. <br />• April 26, 2007 drawing entitled Heit Pit Underdrain Plan View. <br />• April 26, 2007 drawing entitled Heit Pit Underdrain Details and Profiles. <br />• July 13, 2007 Record Drawings entitled Heit Pit Underdrain Plan View. <br />• July 13, 2007 Record Drawings entitled Heit Pit Underdrain Details and Profiles. <br />• July 2007 Heit Pit Underdrain Construction report, prepared by Civil Resources, <br />LLC for SW Chambers. <br />• August 9, 2007 letter to Mark D. Campbell, SW Chambers, LLC, regarding <br />Acceptance of Underdrain Construction Report, Heit Sand and Gravel Pit, from <br />Allen C. Sorenson, DRMS. <br />• September 2007 Construction Observation Report for the Heit Pit Slurry Wall, <br />prepared by Deere & Ault for Hall-Irwin Construction. <br />Should you have any questions or concerns, please feel free to contact me at 970-587- <br />6908, or by e-mail at elafferty@hall-irwin.com. <br />Sincerely, <br /> <br /> <br />Ed Lafferty <br />Construction Division Group Manager <br />Hall-Irwin Corporation <br />KN/ <br />Enclosures <br />Mark D. Campbell <br />Manager of Chambers <br />Management Corp., the <br />Manager of <br />SW Chambers, LLC <br />cc: Jon Benallo, GM, SW Chambers LLC <br />Jeff Gregg, Resources Manager, Hall-Irwin Corporation <br />Penny Burkard, Flood & Peterson <br />Page 2 of 3