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57 <br /> worst, it can cause severe flooding or cave-ins. Furthermore, <br /> once this water penetrates the underground workings it has <br /> the potential of weathering ore minerals to create acid <br /> mine drainage. <br /> Penetration by surface waters can often be traced by <br /> the use of dyes added to the water. Once this has been <br /> done, reclamation procedures can be attempted on the surface. <br /> Diversions by flumes or conduits or the construction of dams <br /> to hold water back are all potentially useful projects. <br /> Trexler and coworkers (39) have published a study done on <br /> the Bunker Hill Mine near Kellog, Utah in which surface water <br /> aquifers were substantiated and recommendations were made <br /> for improvements. This article__makes a nice-case study-of <br /> how to reclaim surface water from underground operations. <br />. F <br /> or waters that are already present underground, the <br /> primary consideration is separation. If conduit aquifer <br /> water cannot be eliminated, it should be separated from <br /> the other waters and piped directly to the surface for dis- <br /> charge. This water should be of similar quality as the surface <br /> water. There is a good chance that it doesn't have to be <br /> treated if it can be shown by careful analyses that it is <br /> just fugitive surface water. If there is appreciable conduit <br /> aquifer water, a separate discharge system would pay for <br /> itself in reduced treatment costs. <br />For waters that are in the category of acid mine drainage, <br />again the primary maintenance consideration is separation. <br />Here, the separation is from better quality waters and from <br />