After much lobbying, work on the Napa Creek portion on the project started in November 2010. This portion of the project was undertaken to control potential flooding in an area along Napa Creek between Jefferson Street and the Napa River in downtown Napa. This area is even more prone to flooding than the river itself. Work in this portion of the project included removal and replacement of existing vehicle bridges, installation of new culvert and reshaping of the creek's bank. Much of this portion of the project was completed in 2013.