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" f AMAX Mineral Resc a Company <br /> 1707 Cole Boulevard <br /> Golden,CO 80401-3293 323III III III I II IIII III <br /> 03 234-9020 <br /> 4 <br /> 999 <br /> ® AMA,'#< <br /> Minerals+Energy <br /> October 23, 1987 <br /> Certified Mail P 424 752 096 slik E C E I V <br /> E D <br /> Mr. Dennis M. Myers OCT 2 61987 <br /> Public Health Engineer MINED LAND <br /> Colorado Air Pollution Control Division <br /> 720 North Main Street FIECLAMATION DIVISION <br /> Pueblo, Colorado 81003 <br /> Re : Report on 1987 Control Activities <br /> Dear Mr. Myers : <br /> As stipulated in your letter dated December 4, 1987, AMAX <br /> Mineral Resources hereby submits the required report on <br /> the Climax Mine Dust Control Plan as approved. <br /> Briefly, the 1987 tailing dust suppression program was <br /> successful in spite of an abnormally early snowmelt and <br /> dry summer. The program was initiated in late May and <br /> terminated in late August. Four tailing dams and three <br /> tailing ponds encompassing approximately 600 acres were <br /> treated with Coherex according to the approved Climax Mine <br /> Dust Suppression Control Plan. In addition, large scale <br /> tests were conducted with Soil Seal , Nalco # 1271 , and <br /> Magnesium Chloride . Calculated cost ratios for each <br /> product indicated that Coherex, by far, was the most cost- <br /> effective. The cost of the 1987 program was approximately <br /> $250,000 (materials, labor, maintenance) . <br /> Dust suppression at the Climax Mine has been an on-going <br /> program for 12 years, and will continue annually until <br /> such time as permanent surface stabilization is in place. <br /> The extent and duration of the program are determined by <br /> site-specific climatic conditions as monitored on a daily <br /> basis. <br /> If you have any questions or require additional clarifica- <br /> tion, please call me. <br /> Sinc rely, <br /> B;k/ <br /> of rey W. odd <br /> JWT:nc <br /> cc : B. Ki lborn <br /> D. Trower, Esq. <br /> E. Bischoff <br />