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.. .. <br />Trapper Mining Inc. <br />c~~e, Cow,edu <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. <br />cir <br />n' <br />- ~, <br />~ ~f <br />q <br />~~~~ <br />Collin R. Fay, Colorado E N .22438 <br />~C ToT'6R ~C, ~~8 ~ <br />Date <br />