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<br />. <br /> <br />previously was uneconomical to mine. These activities and the <br /> <br /> <br />potential for continued or increased mining activity will be exam- <br /> <br /> <br />ined. Their effect on both short and long term water quality will <br /> <br /> <br />be examined. The techniques and their costs for preventing further <br /> <br /> <br />water quality degradation from mining activities will be reviewed. <br /> <br /> <br />This element does not entail any monitoring activities but will use <br /> <br /> <br />existing data and reports. <br /> <br />The development potential of the 3 counties would be examined <br /> <br /> <br />in an effort to determine the future effect of this development on <br /> <br /> <br />water quality. In Gilpin and Clear Creek Counties, the development <br /> <br /> <br />potential is limited by physical considerations such as the topo- <br /> <br /> <br />graphic and water supply constraints. The northern half of Douglas <br /> <br /> <br />County, however, is already experiencing ra~id growth. This is due <br /> <br />in part to the location of Interstate Highway 25 which provides <br /> <br /> <br />excellent vehicle access to the heart of Denver. Coordination and <br /> <br /> <br />regulation of this growth is necessary to assure the success of <br /> <br />measures recommended in DRCOG's 208 Study. The location and exten- <br /> <br /> <br />sion of interceptor sewers, water mains, treatment facilities, and <br /> <br /> <br />the development of the transportation network will have direct ef- <br /> <br /> <br />fects on vater quality in the area. <br /> <br />Also located in Douglas County is Chatfield Lake which is <br /> <br /> <br />nearing completion. Plum Creek flows into the lake from the south- <br /> <br /> <br />east and is one of the main tributaries. Highway 85 parallels Plum <br /> <br /> <br />Creek as it passes through the towns of Castle Rock, Sedalia, an1 <br /> <br /> <br />Louviers. This has encouraged development along Plum Creek. Resi- <br /> <br /> <br />dential development, commercial establishments, and industrial <br /> <br /> <br />facilities will be discharging to Plum Creek. Water quality plan- <br /> <br /> <br />ning for this area must take place at an early stage in the devel- <br /> <br /> <br />opment of the Plum Creek watershed to prevent any degradation of <br /> <br />. <br /> <br />33 <br />