LA Swamp Tidal Reconnection

This BPA funded project involved the restoration of 32 acres of tidal wetland habitat at the “Louisiana Swamp” site on the Westport Slough, 4.5 miles west of Clatskanie, Oregon. LCE developed 3,700 feet of This BPA funded project involved the restoration of 34 acres of tidal wetland habitat at the “Louisiana Swamp” site on the Westport Slough west of Clatskanie, Oregon. LCE designed multiple restoration options for this site resulting in the implementation of 3,700 linear feet of off-channel tidal habitat, 1,100 feet of stream habitat, removal of two tide gates, placement of 213 pieces of Large Woody Debris, and the removal of 1,740 feet of levee. LCE developed a grading plan that focused on maximizing off-channel shallow water habitat. Work also included extensive removal of invasive plants and full-site restoration with suitable native plantings. Final grades and plant species were influenced by a study of a well-established adjacent reference site.

Client: Columbia County Soil and Water Conservation District

Location: Westport, Oregon

Scope of Services:

• Hydraulic modeling

• Development of multiple design alternatives for consideration

• Development of cut/fill quantities

• Construction cost estimation 

• Permitting assistance 

• Participation in the bidding and contractor selection process   

• Construction administration/inspection