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<br />Trapper Mining Inc. <br />Gaig, 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 West Buzzard Dam No. 3, <br />located in Section 29, T 6 N, R 91 W, 6th PM, was inspected by me during construc- <br />tion. Construction of this dam was begun on July 21, 1987, and completed on Sep- <br />tember 12, 1987. I certify that the embankment and spillway were built as designed <br />and the resulting West Buzzard sedimentation system will meet effluent limitations as <br />predicted by hydrologic modelling techniques. <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 />~Ot)C3p <br />o° 0 f3i °~ <br />QQ~~'oooaoo C~ffG <br />o `oo°\~~~cHaROSOoo <br />o ;~ -1',Ga <br />o~,•e~°, no . c <br />o• 0 22g3~ s; •~ a <br />~~ <br />Collin R. Fay, Colorado P No. 22438 <br />Date <br />