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<br />N 111 III11111lIllllll <br />CLIMAX MOLYB/~ENAU`M'COMPANI/ <br />A DIVISION OF AMAX INC. <br />HENDERSON MINE <br />Box 68 -~ <br />Empire, Golorado 80438, <br />(3tY3) 569-3221 <br />November-19, 1986 <br />~~Y~~~~~~~C~ <br />Npy 2 ~, l~S <br />Miry <br />Messrs. James McArdle and David Berry R~C~gINq EO~Np <br />Colorado Department of Natural Resources N'~rvr$roN <br />Mined Land Reclamation Division <br />1313 Sherman Street <br />Denver, CO 80203 <br />Re: Inspection Report on Henderson Mill Visit - September 3, 1986 <br />Dear Messrs. McArdle and Berry: <br />Below are responses to your 1986 inspection report, which we received on <br />October 27, 1986. <br />Tailing Dam <br />The reclamation plan calls for one foot of soil cover on all tailing <br />deposition, which is to be accomplished at the time of mine closure. We <br />intend to comply with this specification at the appropriate time. The <br />present configuration of bench and slope provides us access for necessary dam <br />maintenance and inspection activities. Benches are by design wide enough for <br />our heavy equipment. <br />Soil cover of the present dam profile without any slope modification <br />accomplishes our goals of stabilizing the tailing dam against wind and water <br />erosion. Final reclamation may involve modifications or improvements to the <br />presently employed procedure. However, as noted in our responses to previous <br />inspection reports, we do not wish to limit our operational and maintenance <br />flexibility by performing final reclamation until mining and tailing deposi- <br />tion cease. <br />Drainage Control/Water Quality <br />Attached is an analysis of seepwater from the tailing impoundrt~ent. <br />Prior to 1983, all process water discharged to the tailing ponds was <br />recycled. However, due to record snowfall in [he winter of 1982-83, a <br />reduced production schedule, and subsequent spring melt, we were forced <br />to discharge some excess water to the Williams Fork River. While such <br />discharges may occur again in the future, there has been no basic change <br />in our water management procedure. <br />(1) <br />