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.
Fill Material - Removal
This project connects a 12-acre non-tidal wetland to the main-stem Columbia River. Historically, the area existed as open water of the main stem Columbia River. Dredge material disposal over the last 80 years created a peninsular shaped landform with an isolated 12-acre shallow water wetland in its center. The project connects this wetland to the Columbia through channel excavation and installation of a culvert.
This project aims to improve water circulation in Sturgeon Lake. The improvements to water circulation in Sturgeon Lake will improve access to the lake for juvenile salmon and trout from the Columbia River, providing seasonal over-wintering and rearing habitat. The project would also reduce the sedimentation occurring in the lake and may enhance water quality by flushing out nutrients and bacteria.
Land acquisition was completed by the Columbia Land Trust and subsequently transferred to the Julia Butler Hansen National Wildlife Refuge. The purchase included 473 acres of off-channel tidal, riparian, and upland black cottonwood habitats. Phase 1 restoration included tidal reconnection and replantings on 193 acres of this acquired parcel. The project was funded by the Bonneville Power Administration and United States Army Corps of Engineers.
This project includes stream and floodplain modifications along a 0.27 mile length of Perkins Creek. Proposed modifications will enhance approximately 1.1 acres of stream channel and wetland habitat. The conceptual design contains three significant components to restore natural stream processes and increase stream complexity to enhance habitat:
1) Culvert removal and replacement with natural channel
2) Culvert replacement
3) Riparian zone replanting with native vegetation
Ths project acquires two properties and restores tidal influence within the sites by modifying a tide gate and a culvert, and re-vegetating with native plants in affected areas. The project site includes two separate but connected parcels along the lower Elochoman River just east of Route 4 and the confluence with Elochoman Slough at Columbia River mile 38. The properties are adjacent to the 5,600 acres Julia Butler Hansen Wildlife Refuge and properties conserved by the Columbia Land Trust along Nelson Creek. The western parcel consists of relatively intact tidal wetlands
Started in 2005, Fort Clatsop - Colewort Creek was a two phase tidal reconnection restoration project on National Park Service property in Clatsop County, Oregon.