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C~ • III IIIIIIIIIIIIIIII TR9PP~R MINING INC. 999 CERTIFIED P577401591 April 19, 1 .. ~.t 7' (wg T./ Mr. Gregg Squire Colorado Mined Land Reclamation Division 423 Centennial Building 1313 Sherman Street Denver, CO 80203 Dear Gregg: fll'~fl ~; i~ ln~i~0 Subject: Quarterly sediment pond inspections at Trapper Mine. Section 4.8.1.4 of Trapper's mining and reclamation permit requires quarterly inspection records of sediment control ponds at Trapper be forwarded to the Divi- sion within 30 days of the end of the quarter. The records for the first quarter, 1988, are enclosed. As shown, no major problems were observed. At No Name #5, the dam face received some erosion when a diversion ditch controlling runoff from an adjacent wheat- field broke. Temporary repairs have been made. The erosion does not effect the integrity of the sediment pond and will be smoothed and seeded this summer. West Buzzard Pond No. 3 dam face also received some minor erosion but does not affect the structural integrity of the pond. In addition, the parshall flume and spillway outfall of West Buzzard No. 3 received some erosion damage during the Spring snowmelt. However, the functioning of the pond and spillway are not affected. Minor Revision MR-68 has been submitted to correct this problem. The new ponds built in 1987 have not yet established a vegetation cover from the fall seeding, but are not showing any erosion problems. If a good cover is not established by fall, the structures viii be seeded again. Gregg, please contact me if you have any questions or require further information concerning this report. If you feel these quarterly reports need to be included in our permit, please let me know. A minor revision will be submitted, placing these reports in Appendix Q. Best regards, H. Bruce Humphries Sr. Environmental Engineer LWH/jb(APR19Aj Enclosure pc R.L. Fanyo L.W. Henderson W.S. Harding file P.O. Box 187 Craig, Colorado 81626 (303) 824-4401