Okla. Stat. tit. 61, § 61-112: Bids, contracts, bonds open for public inspection

All bids, both successful and unsuccessful, and all contracts

and required bonds shall be placed on file and maintained by the

awarding public agency for a period of five (5) years from the date

of opening of bids or for a period of three (3) years from the date

of completion of the contract, whichever is longer, and shall be

open to public inspection and shall be matters of public record.