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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. 2, located <br />in Section 25, T6N, R91 W, 6th PM, was inspected by me during construction. Construction <br />of this dam was begun on September 23, 1988, and completed on October 5, 1988. 1 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 />~le.lrlLi...- [7- ~w~- <br />Stephen R. Hinkemeyer, ~ ~ <br />Colorado PE No 25436 <br />/o-Z6-$g <br />Date <br />