Or. Rev. Stat. § 381.670 – Plans for bridge construction; bids; awarding contract

(1) The council shall cause to be prepared surveys, plans, specifications and estimates for the materials to be used and the manner and method of construction of any bridge constructed under ORS 381.605 to 381.670.
(2) The council shall invite bids for the construction of any such bridge in conformity with the plans and specifications.
(3) The council shall award the contract to the lowest and best responsible bidder, but any and all bids may be rejected if it appears to the best interests of the general public. [Amended by 1971 c.659 §5]
INTERSTATE BRIDGES CROSSING COLUMBIA RIVER UNDER JURISDICTION OF BISTATE COMMISSION