This project will achieve the design, permitting, and construction of activities to enlarge existing dike breaches and create new breaches on Mid-Spencer Island. The proposed project site is located in the Snohomish River estuary, east of Everett, Washington, and is owned and managed by Snohomish County for conservation purposes. Historically, the project site was diked and farmed, but in the late 1960's it was abandoned and has since remained unused. Also since this time, the dikes along Steamboat Slough have naturally breached at several locations. However, the breaches are generally limited in width and much less numerous than at intact reference sites (e.g., Otter Island). These undersized and infrequent natural breaches prevent full tidal exchange, limit fish access, and hinder full site restoration.