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TRAPPER MINING INC. <br />CRAIG, COLORADO <br />DAM CONSTRUCTION CERTIFICATION <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 Johnson Dam #9 was inspected by me during reconstruction. <br />Activity began with excavation for removal of the drainpipe/standpipe on September 4, ]99I and ended with <br />placement of erosion wnirol materials in the new channel-type spillway on October 3, 1991. The <br />embankment and spillwaywerc constructed as designed. <br />During construction, the dam was inspected daily to insure compliance with prudent construction methods. <br />Compaction was accomplished by laying fill in thin layers and compacting with a Rex compactor. Compaction <br />of ~Il was checked using a nuclear density probe and a Standard Proctor density previously determined for <br />this material using AASHO Standard Method T99.61. <br />C~`F'S M MgTTF _ _ _ ~- <br />,~ ~~~GIS TfR~,O~ .~2 J es M. i<4att rn <br />r} o lorado PE No. 20537 <br />~ :° <br />FS <br />9 is 0 <br />: <br />S/ ~,,~ <br />>, <br />O <br />~F ~NA. .~~P II~/~9/ <br />`~F CO\'O Datc <br />JMM/Ikw 17ry1 <br />IENG\DAMCER-I~ <br />