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<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 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 />oc p0 SEC/°n <br />c ~p°°°°°°°° J'po <br />o~~o°~e, `~o2~oFo~ <br />o ; J n ..,; <br />O LI o V GG•)~~ po L <br />0 0 <br />°, 0 CO • C <br />Oho o A~~ <br />00'00 00 lyh~J <br />~O~f O'OOe eo00°°° \~~0 <br />oooa~ona ;~~p~~o <br />~~l ,~ <br />Collin R. Fay, Colorado~P `N~22438 <br />~~TraFJE~ ~C~, ~~r~ <br />Date <br />