The Amended Downey Landing Specific Plan is a request to amend the provisions of the Downey Landing Specific Plan that apply to the central 77 acres (the site Downey Studios occupies) of the 154-acre Downey Landing site in order to redevelop it into a mixed-use development.he Amended Downey Landing Specific Plan is a request to amend the provisions of the Downey Landing Specific Plan that apply to the central 77 acres (the site Downey Studios occupies) of the 154-acre Downey Landing site in order to redevelop it into a mixed-use development.