Laserfiche WebLink
<br />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 East Buzzard Dam No. 2, <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 20, 1987, and completed on Sep- <br />tember 12, 1987. I certify that the embankment and spillway were built as designed <br />and the resulting East Buzzard sedimentation system will meet effluent limitations as <br />predicted by hydrologic modelling techniques. One minor modification, relocation of <br />the spillway from the east side of the embankment to the west side of the embank- <br />ment, was made during construction. This modification, authorized by me, was made <br />to accomodate field conditions and did not alter the hydrologic characteristics of the <br />resulting 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 T99~1. 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 />Opu:fapoc <br />°o~~~oHd C~flo ~~~ <br />0 0\, o C ~\C R4~o~~~f ~ r- <br />a~ Collin R. Fa , Colorado E o. 22438 <br />~~~ o~ 2248 <~'~~ y <br />° <br />ou ° ~~ ~ o <br />a o°° ~ 'Lti ~~ /9~7 <br />4•S~ri ~~ni ~-\yJ <br />~~„o~u Date <br />