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TRAPPER MINING INC. <br />CRAIG, COLORADO <br />DAM CONSTRUCTION CERTIFICATION <br />R~~~~VE <br />Auc D <br />~rvlSr~ 3 ~~2 <br />MINERAlS6 EpCOC,~ <br />I, James M. Marrero, a Registered Professional Engineer in the State of Colorado, in accordance with <br />2CCR407-2, Section 4.05.6(7), certify that the rebuild of Johnson Dam No. 10 was inspected by me. <br />Construction activities commenced on June 9, 1992 and were completed by Juty 10, 1992. <br />During construction, the dam was inspected daily to insure compliance with Pruden[ construction methods. <br />Compaction was accomplished by laying fill in thin layers and compacting with a Rex compactor working <br />with a water truck Compaction was checked using the sand cane method and the Standard Proctor density <br />determined using AASHO Standard Method T99-61. Johnson Dam No. 10 was reconswcted as designed. <br /> MAT <br />, <br />~S M: <br /> . <br />F <br />1~~•~~G`SrEREU , 6 . Marrero <br /> ~ ?v C~do#3 o PE No. 20537 <br />20537 W= <br /> • •A Wjjf V <br /> <br />+*, V <br />~~ O~ <br />9 <br />P <br /> TH "~:.:".:: ~'p~ <br />~Zd~1L <br /> GF G~ <br /> ate <br />• <br />JMM/mg/7-21-92 <br />ENG/DAM-JD10 <br />