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• <br />TR9PPER b3ININR INC. <br />• iii iiiiiiiiiiiiiiii <br />999 <br />June 79, 7989 <br />CERTIFIED P 775 746578 ~ ~'~ ~ ~ ~~ <br />Mr. Tony Waldron ~ ~('~ ?, ^ 1989 <br />Colorado Mined land ReGamation Division <br />275 Centennial Building h5ih'~'J Lfi'f`L7 <br />7313 Sherman Street I~ECL,4MATION t71Vf51^f.l <br />Denver, CO 80203 <br />Dear Tony: <br />Subject: Trapper Mine Second Quarter Sediment Pond Inspections. <br />The second quarter 1969 sediment pond inspection reports are attached. There are no structural problems <br />to report and no evidence of piping in older structures with culverts (principal spillways) through the dam. <br />All dams are functioning as designed. Spring runoff has past without incident. The vegetation response <br />from our 1988 seeding is adequate and will be evaluated during the 3rd quaver for remedial seeding this <br />fall. <br />During the 2nd quarter, sediment levels were again approximated as the water levels and turbidity shielded <br />observation of actual volumes. However, at the present time no sediment ponds are proposed for cleaning <br />in 1989. More precise measurements will be made during low water periods this next quarter. In the event <br />pond cleaning activity does occur in 7989, the Division will be not'rfied for approval. The annual sediment <br />survey for Coyote Dam will be conducted within 90 days. Based on runoff observations, last years <br />cleaning should be adequate for several years. <br />We continue to observe some muskrat activity in our sediment control ponds. Appropriate action is being <br />taken to insure against future damage. <br />Sincerely, <br />f~c~ <br />~~LI.GC~77,( ~~G(J <br />William Agnew <br />Senior Environmental Engineer <br />Attachment <br />WSH/rbb/036 <br />pc R.L Fanyo <br />J.M. Mattern <br />W.S. Harding <br />B.D. Nicholson <br />File <br />P.O. Box 187 Craig. Golcfado 81626 (303) 824-4401 <br />