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AS-BUILT CERTIFICATION <br />North Tributary, East Pit Ditch, Reach 1 (Stations 00+00 to 10+41) <br />and <br />Final East Pit Ditch, Reach 1 (Stations 00+00 to 11+17 <br />On November 5, 2010, 1 inspected the completed construction aspects and dimensions of the <br />above referenced postmining channel. I inspected the channel alignment, elevations, depth, <br />bottom widths, and size slopes relative to the postmining design. The channel design is further <br />described in Volume 2C, Exhibit 7-14 R. <br />Construc <br />tion has been completed in accordance with the design requirements and dimensions. In some <br />cases, the ditch width and channel depth was greater than the minimum specked. Rip rap size <br />and placement is acceptable. <br />I am a Licensed Professional Engineer in the State of Colorado and a representative of <br />Environmental Solutions, Inc, P. O. Box 2996, Cheyenne, Wyoming. I am familiar with the <br />Colowyo operation and the coal program permitting process in Colorado. The construction <br />activities described above for the referenced channel are in conformance to applicable <br />requirements of the approved permit documents within CDRMS Permit C-81-019. <br />?0?,'PJDO t /C VY'A <br />O ? <br />32257 <br />0A <br />2%? ••I'•••••••0••• <br />No. <br />/)QL/y <br />UAIE <br />Attachments: Photos 1 through 4 <br />Figure 1, As built location diagram