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<br />120th Estates Partners <br />10201 Brighton Road, Henderson, CO 80640 303-287-2721 <br />September 26, 2008 <br />?OCT ? 2003 <br />State of Colorado <br />Division of Minerals and Geology - <br />Attn: Tony Waldron <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />Re: Lining of Pit at 120th & HWY 85 <br />SW One Quarter of Section 35, Township 1 South, Range 67 West <br />Adams County <br />Mr. Tony Waldron, <br />We would like to propose a -fix" to our current leaking slurry wall that was not keyed in <br />properly when constructed. <br />After several tests, is has been determined that the current slurry wall has two locations <br />that need to be repaired due to infiltration. First area is on the West side of the property <br />for a distance of 400 lineal feet, the second on the North East corner of the property for a <br />distance of 800 lineal feet. We would like to repair the vessel by lining the entire wall at <br />these locations in the same manner that we originally sealed the pond at 124th and HWY <br />85. (Please see attached approval letter). The construction would consist of building a <br />walYof clay/clay stone, the same depth as the slurry wall with a width of 15 feet with a <br />2:1 slope, then finish the slope with sandy clay with a 3:1 slope in front of the clay wall. <br />We are confident that this would seal both areas effectively and would prevent any <br />seepage. <br />Regards, <br />Scott R. Young <br />Project Manager