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Climax Mine Arkansas River Restoration Project <br />1.0 EXECUTIVE SUMMARY <br />The Habitat Management, Inc. Team (Habitat Team) has submitted a final design and restoration <br />plan to assist the Climax Molybdenum Mine (Climax) in its project to restore a segment of the <br />Upper Arkansas River in Lake County, Colorado. This project is in compliance with the U.S. <br />COE Section 404 Permit No. CO-OYT-0211, effective 28 July 1980 and closed 26 June 1985, <br />which authorized Climax to "divert, relocate, and contain" this section of the River. <br />This project entails the development of a channel design and restoration plan to daylight <br />approximately 2,000 feet of the East Fork of the Upper Arkansas River (River) and return it to an <br />aesthetically attractive and geotechnically stable riparian ecosystem. (See attached grading plan <br />for the restored channel, Sheet 5). The River is presently diverted through a concrete pipeline <br />located under the waste rock fill of the Storke Yard Facility site. The upstream watershed that <br />generates runoff into the Storke Yard Facility is approximately five square miles in area (Figure <br />1). <br />Climax is located at an elevation over 11,000 feet at the top of Fremont Pass. Stream channel <br />restoration, habitat construction and revegetation activities are especially challenging at this site <br />as a result of the high altitude, short growing season, harsh winters, heavy snow pack, intense <br />summer thunderstorms and poor soils. <br />This project has been awarded as "design-build" with the Habitat Team conducting baseline <br />monitoring, producing project designs, planning and managing all construction phases, selecting <br />equipment, procuring job supplies and managing field work. Climax and the Habitat Team will <br />work closely together during all phases of the project and key issues will be considered and <br />addressed throughout the project. <br />This project is in a highly visible area and will be continually observed by the public and <br />regulatory agencies during implementation and afterwards. As such, Climax is committed to <br />making this a showcase project, with a final product that is innovative, creative, visually pleasing, <br />naturally stable, and in harmony with the surrounding undisturbed environment. <br />Reconstructed channel designs have incorporated hydraulic stability, sinuosity, meander <br />frequency and gradient fitting with the natural, undisturbed environment. The restored stream <br />channel is designed for long-term stability and will be capable of supporting viable invertebrate <br />and trout populations along with a self-sustaining riparian and wet meadow plant community <br />along the channel. The reconstructed channel will be given special consideration to ensure that its <br />design does not adversely impact downstream water quality and that the quality of water re- <br />routed through the restored channel will be adequate to support selected post-mining uses. In <br />short, the Habitat Team's design will create and sustain a suite of ecosystem characteristics and <br />functions; functions that have biological value as well as economic, social, cultural and <br />recreational values. <br />Habitat Team March 28, 2007