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Trapper Mining Inc. <br />Craig, Colorado <br />DAM CONSTRUCTION CERTIFICATION <br />I, Collin R. Fay, a Registered Professional Engineer in the State of Colorado, in ac- <br />cordance with 2 CCR 407-2, Section 4.05.6(7), certify that Ute Dam No. 1R, located <br />in Section 3, T 5 N, R 91 W, 6th PM, was inspected by me during construction. This <br />reconstruction of Ute Dam No. 1 was begun on June 18, 1987, and completed on <br />September 12, 1987. I certify that the embankment and spillway were built as <br />designed and the resulting Ute sedimentation system will perform equally as well or <br />better than the system previously in place. One minor modification, relocation of the <br />spillway from the west side of the embankment to the east side of the embankment, <br />was made during construction. This modification, authorized by me, was made to ac- <br />comodate field conditions and did not alter the hydrologic characteristics of the result- <br />ing sedimentation pond. <br />During construction, this dam was visually inspected daily to insure compliance with <br />prudent construction methods. Compaction was accomplished by laying fill material <br />in thin horizontal layers and compacting with a vibratory roller compactor, a dozer, <br />and/or scrapers. Standard Proctor densities were determined in our lab using <br />methods outlined in AASHO Standard Method T99-61. Compacted density and mois- <br />ture content of the placed fill material was monitored using a nuclear density probe to <br />ensure adequate compaction. //////JJJ <br />I/Ap0 RE~~q. <br />Mssono C~k.. <br />e R ,.....,, sl. <br />o°o~~ `~~\CHARpfoa~y~, <br />• ~ •y ti ~ °: Collin R. Fay, Colorado PEN .22438 <br />-~, . ,., <br />o'~:~ 22438 '°~•` <br />.• ,, <br />o-o <br />• ?R~ <br />.oFF .. o, <br />,`: s~• .....•N~~;o Date <br />w~OJ~A o~~1 <br />i <br />