Okla. Stat. tit. 66, § 66-308: Contracts

All contracts for the construction, reconstruction, repair,

replacement and maintenance of railroad rights-of-way or trackage

shall be let by the Department to the lowest responsible bidder, or

bidders, after notice by publication in the same manner as provided

in the Public Competitive Bidding Act of 1974; provided, the

Department may reject all bids and readvertise the same.