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onsuitants.inc <br />Geotechnlcal /Environmental EneineerinQ • Muerials Testin; <br />December 12, 1996 <br />Twentymile Coal Company <br />29515 RCR #27 <br />Oak Creek, 80467 <br />Attn: Mr. Rick Mills <br />Subject: Roadway Cer[i£ca[ion Letter, <br />EMD Bleeder Shah Access Road, Foidel <br />Creek Mine, Routt County, Colorado. <br />Gentlemen, <br />• <br />I, Brian D. Len, a registered professional engineer, registry number 25750, in the state of Colorado, <br />certify [hat the EMD Bleeder Shaft Access Road was surfaced in accordance with our <br />recommendations outlined in Exhibit 25K The contractor surfaced approximately 700 lineal fee[ of <br />roadway. The portion of the roadway resurfaced started a[ [he intersection with Rout[ County Road <br />#33 and terminated just west of the ventilation shaft. <br />We inspected [be subject roadway on November 2S, 1996 to verify that the gravels were placed and <br />compacted to at least 95% of the modified Proctor density determined in accordance with ASTM <br />D15S7. We also verified that the contractor had placed the requ'ved amount of gravels, 14 inches. In <br />fact the contractor had placed 1S to IS inches of pit run sand and gravels over a layer of geotextile <br />fabric. The pi[ run sands and gravels were compacted from 96 to 97 percent of the maximum modified <br />Proctor density. <br />IF you have any questions arding this certification, or if we can be of further service, please contact <br />this office. ~ ., <br />Sincerely, <br />NORTHWFSC <br />Brian D. Len, P.E. <br />• <br />(970) 879.7888 • Fax (970) 879.7891 <br />29585 U.S. 40 West, Box 775226 • Steamboat Springs, CO 80477 ~^R °t~O <br />