Turnstone successfully permitted the 89-acre Claremont Road Mitigation Bank (CRMB) in the headwaters of the John Day River near Astoria, Oregon. The project team has been providing environmental engineering services for this project since April 2010. The mitigation bank has restored tidal influence to over 50 acres of formerly diked wetland. The project has restored and enhanced a water type disproportionately lost in the region and has created mitigation opportunities in the Lower Columbia Watershed. Key features of the project include removing a barrier to fish passage, reintroducing tidal influence to an area that has been diked for over 75 years, restoring over 50 acres of fish-rearing habitat, and converting a currently invasive-dominated plant community to a native, freshwater tidal wetland.