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<br />TRAPPER MINING INC. <br />CRAIG, COLORADO <br />DAM CONSTRUCTION CERTIFICATION <br />embankment and spillway were constructed as designed. <br />1, James M. Mattern, 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, 1991 and ended with <br />placement of erosion control matcriaLs in the new channel-type spillway on October 3, 1991. The <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 fill 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 />M. MqT <br /> <br />N e o 20537. <br />~ of <br />;: ~ <br />TF ~~A:. <br />~OF c0 <br />F~2~J es 7,4. Matt rn <br />lorado PE No. 20537 <br />.. ~r <br />t iisi/qi <br />Date <br />]MM/Ikw 11 N1 <br />IENG\DAMCER7] <br />