Laserfiche WebLink
TRAPPER MINING INC. <br />• CRAIG, COLORADO <br />DAM CONSTRUCTION CERTIFICATION <br />I, James M. Matters, a Registered Professional Engineer in the State of Colorado, in accordance <br />with 2CCR407-2, Section 4.05.6(7), certify that West Flume Dam was constructed under my <br />supervision. Construction activities commenced on September 11, 1997 with topsoil stripping <br />and ended with the as-built survey on October 23, 1997. <br />During construction the site was inspected daily to insure conformance with prudent <br />construction methods. Compaction was accomplished by laying suitable material in thin, <br />horizontal layers with CAT 637E scrapers. Compaction was accomplished with the use of a Cat <br />815 compactor accompanied by a water truck. <br />An as-built survey was performed when construction was complete. The attached table shows a <br />comparison of design and as-built performance predictions as modeled with SEDCAD software. <br />As-built model results meet or exceed design model results in capacity, peak discharge and peak <br />effluent concentration. SEDCAD output for the as-built configuration is attached. <br /> <br />J S M. MATTERN <br />CO PE 20537 <br />S~~s~9£3 <br />DATE <br />rt-~R - /64 <br />JUL 3 1 1998 <br />