“Coastal zone” means that area of the state defined in subdivision (a) of Section 31006, except that it includes lands in Contra Costa County from the Richmond-San Rafael Bridge north and east to the termination of the jurisdiction of the San Francisco Bay Conservation and Development Commission, as described in Section 66610 of the Government Code, as well as any adjacent uplands, managed wetlands, marshes, and diked lands that significantly affect the environmental quality of the bay, or that are directly related to the public use and enjoyment of the San Francisco Bay.