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.
Okla. Stat. tit. 61, § 112