Laserfiche WebLink
<br />Trapper Mining Inc. <br />Craig, Colorado <br />DAM CONSTRUCTION CERTIFICATION <br />i <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 Johnson Dam No. 8R, lo- <br />cated in Section 27, T 6 N, R 91 W, 6th PM, was inspected by me during construc- <br />tion. This reconstruction of Johnson Dam No. 8 was begun on June 17, 1987, and <br />completed on September 12, 1987. I certify that the embankment and spillway were <br />built as designed and the resulting Johnson sedimentation system will perform equally <br />as well or better than the system previously in place. <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 />r°°0 RE °• <br />}!Q,a~..... ~~Sl~ <br />~ yti~ .~Et\CHAkpso fP~~ <br />i J'~ Z :~~ <br />,. <, ~ ~ <br />"' ~ ~ 22438 '= ' <br />.A: :Qi <br />e9 <br />•O~ •~ ~i ~4.• <br />~~~~NA ~ ~Nj ° <br />~~r~,;, <br />Collin R. Fay, Colorado PE~NQ~ 22438 <br />DCTOl3E.~ ~L, ~ `~8 7 <br />Date <br /> <br />