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Title: Environmental Assessment for the Columbia Stock Ranch Section 536 Ecosystem Restoration Project
Authors: United States. Army. Corps of Engineers. Portland District
Keywords: Columbia River Estuary (Or. and Wash.)
Restoration ecology
Environmental management
Environmental protection
Publisher: United States. Army. Corps of Engineers. Portland District.
Abstract: This Environmental Assessment (EA) has been prepared by the U.S. Army Corps of Engineers, Portland District (Corps) in cooperation with the Bonneville Power Administration (BPA), (together, the Action Agencies) to evaluate the Columbia Stock Ranch Ecosystem Restoration Project. This project is proposed as part of the Corps’ Section 536 Authority to conduct studies and implement ecosystem restoration projects in the lower Columbia River and Tillamook Bay estuaries. The proposed ecosystem restoration project requires review under the National Environmental Policy Act (NEPA) and implementing regulations at 40 Code of Federal Regulations. The Columbia Land Trust (CLT) is the landowner for the subject property and BPA is the project sponsor and a cooperating agency under NEPA. The purpose of this EA is to consider the environmental impacts of implementing habitat restoration actions at the Columbia Stock Ranch (CSR) property in Columbia County, Oregon. The CSR project area consists of approximately 460 acres of floodplain and riparian habitats adjacent to the Columbia River, with 1.5 miles of frontage to the river. Currently, the CSR project site is disconnected from the lower Columbia River and estuary by a flood reduction levee and juvenile salmonids do not have access to the project site for rearing and foraging. This EA describes and evaluates the benefits of restoring hydrologic connectivity between the Columbia River and the CSR project site to improve habitat for fish and wildlife, including salmonids listed under the Endangered Species Act (ESA) of 1973. Alternatives were developed to maximize restoration potential on the project site. All alternatives, including the Proposed Action, include construction of a setback levee and breaching the existing Columbia River Levee to facilitate inundation of the project site by tidal waters from the Columbia River and the provision off-channel habitat for juvenile salmonids while simultaneously providing the same level of flood protection that adjacent landowners currently experience with the existing levee.
Description: Environmental Assessment
Rights: Approved for Public Release; Distribution is Unlimited
Appears in Collections:Environmental Documents

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