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Title: Final Environmental Assessment: Kootenai River Project Downstream of Libby Dam, Lincoln County, Montana
Authors: United States. Army. Corps of Engineers. Seattle District
Keywords: Kootenai River
Libby Dam (Mont.)
Stream restoration
Environmental management
Environmental protection
Publisher: United States. Army. Corps of Engineers. Seattle District.
Abstract: There is an overall lack of aquatic habitat complexity downstream of Libby Dam. Fish habitat downstream of Libby Dam is limited by lack of recruitment of large wood and sediment due to the existence of the dam. Existing large wood complexes are aged and degraded, and although they continue to function, have become less functional. In addition, the hydrograph below Libby Dam is reversed, and blockage by the dam has led to an almost total absence of recruitment of woody vegetation on existing river banks and gravel bars, though recent flow changes have allowed limited recruitment of willows, cottonwoods, and grasses and shrubs in relatively small areas. Pool formation by large wood complexes is absent. Point bar formation in the absence of sediment recruitment is non-existent. This limited fish habitat directly affects fish populations in the river and contributes to the observed declines in trout populations in recent studies (MFWP, 2013). The need for this action is to address the lack of fish habitat and thereby increasing fish population. The purpose for the habitat improvement project components is to address the lack of fish habitat, help restore Kootenai River ecosystem function, and thereby increase fish populations.
Description: Environmental Assessment and Finding of No Significant Impact
Rights: Approved for Public Release; Distribution is Unlimited
Appears in Collections:Environmental Documents

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