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Title: Final Environmental Assessment : Mouth of the Columbia River Dredged Material Management Placement Sites Update, Clatsop County, Oregon and Pacific County, Washington
Authors: United States. Army. Corps of Engineers. Portland District.
Keywords: Dredging
Dredging spoil
Mouth of the Columbia River (Or. and Wash.)
Columbia River
Environmental management
Environmental protection
Publisher: United States. Army. Corps of Engineers. Portland District.
Abstract: The U.S. Army Corps of Engineers (Corps), Portland District is adding two new locations to the network of placement sites for the beneficial use of dredged materials at the Mouth of the Columbia River (MCR). The two sites include the shoreline of East Sand Island (ESI) in Clatsop County, Oregon and a nearshore site, North Head (NHNS) site, off the Pacific County shoreline of Washington. Both sites would receive dredged material from the MCR and Lower Columbia River (LCR) Federal Navigation Channels (hereafter referred to collectively as the FNC). This Environmental Assessment (EA) evaluates the environmental effects of this proposal. Though the majority of material that would be placed at the two proposed new placement sites would likely originate from the MCR maintenance dredging program between river miles (RM) -3 and RM +3, the Corps is extending the impacts analysis upstream to RM 12 to account for potential longest distance of transport of material that could be used at ESI. Additionally, the ESI placement shoreline placement area is located between RM 5 and RM 7, which is located in the LCR. Therefore, the spatial boundaries of this impacts analysis include the western most boundary of the proposed NHNS site and the portion of the LCR up to RM 12.
Description: Environmental Assessment and Finding of No Significant Impact
Rights: Approved for Public Release; Distribution is Unlimited
Size: 100 pages / 8.76 MB
Types of Materials: PDF/A
Appears in Collections:Environmental Documents

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