Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/40240
Title: Mount St. Helens Long-Term Sediment Management Plan : Final Supplemental Environmental Impact Statement
Authors: United States. Army. Corps of Engineers. Portland District
Keywords: Mount Saint Helens (Wash.)
Sediment control
Flood control
Environmental management
Environmental protection
Publisher: United States. Army. Corps of Engineers. Portland District.
Abstract: The Upper North Fork Toutle River ecosystem has been impacted by a number of historical events, most substantially by the 1980 eruption of Mt. Saint Helens and subsequent effects on downstream watersheds. In 1985, U.S. Army Corps of Engineers (USACE) adopted the Decision Document for sediment management in the Upper North Fork Toutle River basin. The 1984 environmental impact statement (EIS) and 1985 Decision Document documented the anticipated effects of sediment management and flood risk management on the Toutle and Cowlitz rivers. The 1985 Decision Document recognized the likely need for a future reevaluation of sediment management based on changes in future conditions. This EIS provides an update to the 1984 EIS and 1985 Decision Document. Additionally, this SEIS compares the current conditions and projected on-going effects of the USACE’s sediment management activities to those documented in the 1984 EIS. This SEIS also evaluates the potential environmental impacts of each of the current proposed long-term sediment management alternatives as a supplement to 1984 EIS and 1985 Decision Document. This SEIS also evaluates the potential environmental impacts and alternatives to fish conservation measures necessary to prevent sediment management actions from jeopardizing the continued existence of endangered species or threatened species or destroying or adversely modifying those species’ designated critical habitat.
URI: https://hdl.handle.net/11681/40240
Appears in Collections:Environmental Documents

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