Section 1403 Of Article 3. Joint Bridges From California Streets And Highways Code >> Division 2. >> Chapter 5. >> Article 3.

. The board of supervisors reconstructing, replacing or relocating such bridge may enter into an agreement with any person who is then maintaining any bridge across any such navigable stream, for the building of a joint bridge in order to prevent the impeding of commerce on such navigable stream, and to apportion the expense between the county and the person in any manner mutually agreed upon.