Oregon Revised Statutes Highways, Roads, Bridges and Ferries § 382.310

(a) Maintain, keep in good condition and repair and operate the bridges and their approaches. The lighting of the bridges and their approaches is a part of the duty to maintain and operate such bridges, and the board may enter into contracts for such lighting.

(b) Operate, maintain and keep in good condition all parts of the bridges owned by the city or leased by the city or by the board of county commissioners.

(a) Employ, hire and discharge, from time to time, agents, workers, laborers and servants, as it deems necessary in the conduct, maintenance, repair and operation of the bridges and their approaches.

(b) Make needful rules and regulations for the operation and maintenance of the bridges, but such rules and regulations shall be subject to the exercise by the City of Portland of such police power and authority as the city has under its charter with respect to the bridges owned by the city.

(a) Under the board's jurisdiction as a road authority pursuant to ORS 810.010; or

(b) Operated and maintained by Multnomah County as required under this section and ORS 382.305.