Estuary Partnership Projects

Habitat restoration projects which meet at least one of the following criteria:

1) All or partial funding for the project is provided through the Estuary Partnership

2) The project is sponsored or co-sponsored by the Estuary Partnership.

The Estuary Partnership has been engaged in habitat restoration projects in the Lower Columbia River and Estuary since the inception of it's Comprehensive Conservation and Management Plan in 1999. For more detailed information, visit our Habitat Restoration web page

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Wallacut River Acquisition & Restoration

This project permanently protects113 acres of forested wetland habitat at the confluence of the Wallacut River and Baker Bay (Columbia River mile 3), a back water area of the lower Columbia Estuary.  The project site includes numerous tidal channels and sloughs, some now hydrologically disconnected from the Columbia by the installing flood control structures.  Future restoration concepts include removing tide gates and culverts to re-establish tidal influence, removing invasive plant species and restoring the native plant community.

Wapato Access

This project completes restoration design to restore the hydrologic connection between 56 acres of the site and Multnomah Channel. Additional components include installing large wood, removing invasive species, and planting native vegetation.  The 156-acre site, owned by Oregon Parks and Recreation, is located along the southern end of Multnomah Channel on Sauvie Island.  A combination of river flow regulation and human manipulation of natural levee formations has resulted in disconnection of the floodplain from the Multnomah Channel.

Thousand Acres, Sandy River Delta Restoration

This project restores hydrologic connection to the Columbia River by removing/modifying existing flow control structures.  Additional activities include placing large wood, controlling invasive species, replanting native vegetation, and excavating.  The 100-acre site is located within 500 acres of US Forest Service owned property at the Sandy River Delta to the east of Sun Dial Island at Columbia River mile 122.  The site historically was a mix of tidal forested and palustrine wetland floodplain habitat, but is now dominated by invasive plants (Himalayan Blackberry, Reed Cana

South Tongue Point Restoration - Liberty Lane

This project restores tidal connection to a 10-acre diked tidal wetland through tide gate removal and culvert replacement; installs large wood, removes invasive plant species, plants native species, and excavates tidal channels. The site was historically a brackish wetland that was disconnected from the bay by installing a tide gate and culvert under a road at the entrance.  The site is owned by the State of Oregon and is located along the southwest shoreline of Cathlamet Bay at Columbia River mile 18.

South Scappoose Floodplain Restoration

This project is located on South Scappoose Creek and is in design for the restoration of a 4,810-foot section. This project will restore salmonid habitat by addressing streambank mass wasting, reconnecting existing off-channel habitat, removal of exotic invasives and replanting a diverse native riparian buffer.

This project received non-Estuary Partnership funding, but was co-sponsored by the Estuary Partnership.

Scappoose Confluence Restoration

This project involved restoration of  approximately 4.5 acres of floodplain at the confluence of North and South Scappoose Creeks, by removing invasives, reconnecting off-channel habitat, and replanting it with native trees and shrubs. In addtion, ~1,200 ln. ft of North Scappoose Creek was restored by stabalizing eroding streambanksand installing large wood. Exotics will be managed for 5-years following construction, to aid in the establishment of plantings. Effectiveness monitoring is also being conducted.

Rinearson Slough

This project completes a feasibility study to evaluate restoration options along the 5.8 mile Rinearson Slough where salmonid access has been restricted by dikes and impaired by elevated water temperatures, decreased flow, and invasive plant species.  The site is located along the south bank of the lower Columbia River at mile 63 behind a railroad embankment that functions as a dike cutting off the connection to the Columbia.  The floodplain is heavily impacted by residential and agricultural development.  Restoration alternatives being considered include installing a tide ga

Reach C Westport Slough - Karamanos

This project investigates restoration alternatives for creating off-channel habitat at a 90-acre site near the confluence of Westport Slough and the Columbia River at Columbia River mile 43.  The site has been significantly altered by past dredge fill andagricultural practices that have eliminated the majority of the native plant community and juvenile salmonid habitat.  Restoration approaches include restoring natural site topography, creating a tidal channel network, creating emergent tidal wetland, enhancing existing habitat, and restoring full-site native vegetation. 

Pierce Island Restoration

This project completes a feasibility study to evaluate different restoration actionson the 136-acre island.  The site is located at Columbia River Mile 142 adjacent to the Pierce National Wildlife Refuge.  The island, currently held in conservation, contains important rearing, refugia, and potential chum spawning habitats for Columbia Basin salmonids, and is inundated seasonally during the spring freshet.  The island’s native vegetation includes a Washington State listed endangered species which is threatened by invasive vegetation.

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