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.^ DIVISION OF MINERALS AND GEOLOGY Depanmem u(Nmural Resources 131 } Sherman SL. Room 21 S Denver, Colrrarb 802113 Phune' (4031 866 356i FA%:130 }I 832-tl 10fi October 29, 1996 Mr. Forrest Luke Environmental Manager Trapper Mine P. O. Box 187 Craig, Colorado 81626 ~~~ III~~~~I~~~~~11~ STATE OF COLOKAUU O,qq~ TJ ~I~~~ DEPARTMENT OF NATURAL RESOURCES Roy Romer Governor lames 5. Lochhead Ezecuiive Director Michael 8. Long Division Direcror RE: Special Focus Inspection Issues At Trapper Mine, Trapper Mine, Permit No. C-81-010, Trapper Mining, Inc. Dear Mr. Luke: The Division would like to take this opportunity to summarize the progress in resolving the concerns or suggestions that surfaced during the in-office review of Trapper's permit application, held during the week of August 26, 1996, and the September 3 and 4, 1996 field inspection at Trapper Mine for this special focus inspection. OFFICE REVIEW 1. On page 4-222 of the permit application, OSM believed that two statements needed clarification. The first statement was "The baseline data did not adequately define the expected TSS values from the Trapper Mine drainages." OSM was concerned that this statement could mean that the Division approved a permit application without adequate baseline data. The Division has examined this first issue and believes that there is no cause for concern. In the paragraph which contains this sentence, the operator was attempting to explain why there were three extremely high values of TSS, averaging 20400 mg/1, obtained on March 14, 1980 from water sampling in the No Name drainage, as shown for site S-5 in Table 4.8-8 on page 4- 209 of the PAP. Apparently, the operator surmised that these anomalous readings were due to the effects of mining plus background effects that had not been pic)ced up in the baseline study. Examination of the TSS levels for all of the water monitoring sites listed in Table 4.8-8 shows that these data