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Water Quality Monitoring Programs <br /> Discharge permit stipulations require that Climax sample and <br /> test discharge water quality and ambient stream quality on a <br /> regular basis . The two groundwater wells are sampled quarterly. <br /> Unscheduled, special samples are also collected and analyzed on <br /> an "as needed" basis . Water samples are presently analyzed by <br /> Hazen Laboratories . <br /> In addition to its extensive water quality monitoring program, <br /> Climax conducted an aquatic biological monitoring program from <br /> 1970 through 1988 . These stream surveys monitored macroinverte- <br /> brate and fish populations in the Arkansas River, Eagle River, <br /> and Tenmile Creek drainages . Results of this program indicate <br /> ecological stability in all drainages with a steadily improving <br /> trend in the Tenmile Creek system. Tenmile Creek supports <br /> viable, natural reproducing populations of brook and brown trout <br /> from the Climax discharge point downstream to Dillon Reservoir . <br /> Rainbow and cutthroat trout also inhabit the system. Macroin- <br /> vertebrate populations are diversified and are typical of <br /> western high mountain streams which support clean water <br /> organisms . Annual reports of the biological monitoring program <br /> are on file at Amax Mineral Resources Company and the Colorado <br /> • Division of Wildlife . <br /> FLOOD CONTROL <br /> Flood control is an integral part of the Climax operations and <br /> will continue to be so in the future . The present and future <br /> flood control system is complex and includes reservoirs, tun- <br /> nels , interceptor canals , decanting systems , control structures , <br /> and pumping facilities. Present and post-mining flood control <br /> systems have been analyzed and studied by professional engineer- <br /> ing firms and Climax Mine engineers for many years . The most <br /> recent study was conpleted by W. W. Wheeler & Associates , Inc . <br /> in late 1986. These complex reports are available at the Climax <br /> Mine . Table 3 , entitled " Flood Hydrology Summary - Climax <br /> Area" , defines various drainage areas , and probable flood condi- <br /> tions relative to snowmelt and rainfall . Data contained in this <br /> table are the basis for flood control planning on the Climax <br /> Mine property. <br /> The major volume of surface runoff on the property is from <br /> melting snow. However , there is the potential for intense pre- <br /> cipitation events during the summer which can cause short dura- <br /> tion, high peak flows of small volume. Lowpeak floods can occur <br /> from melting snow, but these can be bypassed around the mine <br /> operations via the water handling facilities required for rain- <br /> driven events . <br /> G-7 <br />