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Adam 's main role as our Fellow is to advise us on better ways of cleaning up pollution from abandoned mines , by developing a better understanding about the extent and the nature of mine wastes and pollution . Our largest detonations were similar in size to freeway-construction or mine detonations and posed no greater hazard to triggering of earthquakes than do those detonations . These impacts include : elemental and methyl mercury point and non-point discharge from placer gold mine sluice tunnels and tailings in stream channels , discharge from mercury mines and millsites , acidic mine drainage from mine openings and dumps at massive sulfide orebody-type mines , asbestos mines discharge fibrous mine wastes in stream channels , and airborne erosion of mine wastes . A third type of acid soils results from the leaching of mine wastes - a problem encountered on mine sites worldwide . These impacts include acidic metal laden drainage from mine openings and dumps , mine wastes and mill tailings in stream channels , and erosion of mine wastes and mill tailings into waterways . An average mine costs between $ 10 to $ 20 , while the cost of removing it ranges from $ 300 to $ 1,000 . These impacts include contaminated sediment transport to waters of the state , acidic metal laden drainage from mine openings and dumps , mine wastes in stream channels , and erosion of mine wastes into waterways . It is also undisputed that , even though the mine maps were prepared and certified by employees of Jesse Branch , they stated that they were " engineered by Kyber . You will enjoy the sights of 22-meter high Shirogane-no-taki Falls at the entrance , Raion-no-taki Falls upstream , Choja-keikoku Valley with its monolithic riverbed , and Nobezawa-Ginkodo silver mine cave where you can take a 30-minute adventure tour through illuminated mine tunnels .