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III IIIIIIIIIIIIIIII STATE OF COLORADO Roy Romer, Governor Patti 6hwayder, Acting Executive Director Dedicated to protecting and improving the health and environment olthe people of Colorado 4300 Cherry Creek Dr. S. Laboratory Building Denver, Colorado 80222-1530 4210 E. 11th Avenue Phone (303) 692-2000 Denver, Colorado 802 2 0-3 71 6 (303) 691-4700 Water Quality Control Division WQCD-PE-B2 (303)+692-3500 FAX (303)+782-0390 March 27, 1995 Forrest V. Luke, Manager, Environmental Affairs Trapper Mining, Inc. P.O. Box 187 Craig, CO 81626 IlE: Spoils Spring at Outfall 005 Trapper Mining,Inc.-Trapper Mine CDPS No. CO-0032115 Moffat County Dear Mr. Luke: OF ~~[p ,~~ %~ \~~ r ~ /B76 Colorado Department of Public Health and Environment 'ZF(;EI~/EQ l'iAR 31 f995 '.liv~sion of minerals & Geology Through conversations with Larry Henderson, 1 have become aware of details concerning a seep located near outfall 005 that is considered at this time to be a spoils spring. It is my understanding that this seep is outside the mining boundary and below pond 005, however it is above the dam for outfall 005. For this reason, it has been routed so that it discharges through outfall 005 and would mix with any flow from the pond going to Coyote Gulch. Mr. Henderson indicated that the seep is monitored, but that this analytical data are not included on the discharge monitoring reports (DMR) for outfall 005. [ spoke to Joe Dudash with the Colorado Division of Minerals and Geology (CDMG) last week to see what information the CDMG had on this seep. They have very little information on file concerning it and neither Joe nor the previous specialist, Kent Gorham, was aware of why this seep would be included in the permit. He noted that Itis file showed that Trapper only monitored the seep if the flow appeared [o be above 5 gallons per minute. As long as it is covered under the CDPS permit, a~ flow should be monitored and the results reported on the DMR. 1 left a request on Larry's voice mail last week to submit analytical data for the seep to my office for review. I do not know for certain if he received the request because I did no[ ask for a confirmation call back. This letter is a supplemental written request for these same data. Please submit at least the previous five years data for all parameters monitored for this seep. The permit amendment currently being drafted will leave outfall 005 as it is currently covered. It is possible that if the data indicate that the seep does not appear to be influenced by past or present mining activity, the seep flow may be excluded from the permit. If we reach this conclusion, the permit will be reopened at a later date for appropriate changes. However, at the present, since it discharges through an outfall covered under the permit, data from the seep should be included on DMRs for outfall 005, regardless of the flow volume.