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McCarthy Creek Phase II Restoration Project (DOE/EA-2006/SA-05)
Multnomah County, Oregon
Bonneville Power Administration (BPA) has decided to fund the Columbia River Estuary Study Taskforce (CREST) to undertake the McCarthy Creek Phase II Restoration Project near the southern confluence of Multnomah Channel with the Columbia River in Multnomah County. The overall goal of the McCarthy Creek Phase II Restoration Project is to return full floodplain connectivity and juvenile salmonid access from Multnomah Channel to the backwater sloughs, wetlands, and riparian areas along lower McCarthy Creek. Improving floodplain connectivity and enhancing the naturally functioning, dynamic wetland system would help to address the key limiting factors for habitat needs of juvenile salmonids (chum, Chinook, and coho) and wildlife species in the region.
The proposed project has two overarching objectives, which are shown below. The bullets below each objective demonstrate the actions that would be taken to ensure each objective is met. 
Objective 1: Enhance fish access and improve hydrologic connectivity to Multnomah Channel
                  Remove an undersized culvert and associated earthen berm
                  Contour bank to emulate natural channel geometry to achieve optimal velocities for fish passage
                  Install plantings to soften channel edge and enhance riparian vegetation
Objective 2: Increase native wetland plant diversity
                  Lower marshplain surfaces to increase frequency, duration, and magnitude of water inundation to
          reduce germination and colonization capacity of invasive species
                  Replant lowered marshplain with native emergent species to jump-start seed bank and prevent
          reinfestation of invasive non-native plant species
                  Install beaver dam analogs to prolong duration of inundation and increase channel complexity

BPA prepared a Supplement Analysis (SA) following the procedures in DOE’s NEPA Implementing Procedures at 10 CFR 1021 to the Columbia Estuary Ecosystem Restoration Project Environmental Assessment (Programmatic Estuary EA). The Programmatic Estuary EA analyzed the environmental impacts anticipated for restoration projects within the Columbia River Estuary, with the intent of facilitating and streamlining future site-specific project reviews.
This SA considered project specific impacts within the Columbia River estuary as a result of the McCarthy Creek Phase II Restoration Project. The SA describes anticipated impacts to fish; hydrology and hydraulics; water quality; geomorphology, soils, and topography; sediment quality; air quality; wildlife; wetlands, floodplains, and vegetation; land use and recreation; cultural resources; socioeconomics; visual resources; noise, hazardous waste, public health, and safety; transportation and infrastructure; and climate change.
BPA did not conduct independent public scoping for this project due to the project’s consistency with the analysis provided in the Programmatic Estuary EA, for which a finding of no significant impact (FONSI) was issued on July 7, 2016.

The schedule for the environmental review is as follows:
​NEPA analysis and documentation
Construction start
​June 25, 2019
July 15, 2019
BPA released its supplement analysis for the McCarthy Creek Phase II Restoration Project.  The supplement analysis is available at the link below.

For environmental information, contact:
Elisabeth Bowers 
Environmental Protection Specialist
ACS Pro Staffing
Bonneville Power Administration - ECF-4
PO Box 3621
Portland, OR 97208 -3621

Toll-free:  800-622-4519
Direct line:  503-230-5184
For project information, contact:
Ann Creason
Project Manager
Bonneville Power Administration - EWL-4
PO Box 3621
Portland, OR 97208 -3621

Toll-free:  800-622-4519
Direct line:  503-230-3859


Public letter                             (07/22/2016)
Final EA                                  (07/07/2016)
FONSI/Mitigation Action Plan      (07/07/2016)

Supplement Analysis               (06/25/2019)