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TRAPPER MINING INC <br />CRAIG, COLORADO <br />DAM CONSTRUCTION CERTIFICATION <br />I, Stephen R. Hinkemeyer, a Registered Professional Engineer in the State of Colorado, in <br />accordance with 2 CCR 407-2, Section 4.05.6(7), certify that East Pyeatt Dam No. 1, located <br />in Section 25, T6N, R91W, 6th PM, was inspected by me during construction. Construction <br />of this dam was begun on September 21, 1988, and completed on October 5, 1988. I certify <br />that the embankment and spillway were built as designed and the resulting East Pyeatt <br />sedimentation system will meet effluent limitations as predicted by hydrologic modelling <br />techniques. <br />During construction, this dam was visually inspected daily to insure compliance with prudent <br />construction methods. Compaction was accomplished by laying fill material in thin hori- <br />zontal layers and compacting with afront-end loader and/or scrapers. Standard Proctor <br />densities were determined in our lab using methods outlined in AASHO Standard Method <br />T99-61. Compacted density and moisture content of the placed fill material was monitored <br />using a nuclear density probe to ensure adequate compaction. <br />~d vo"r+/s ~7~ ~p <br />~~~ Stephen R. Hinkemeyer, <br />25436 ~~ Colorado PE No 25436 <br />o~ <br />~o vooae~~~,~~~ l a - z~ • 8 f3 <br />PJA~...,,o~• Date <br />