This prequalification process is a mandatory process for all Licensed Contractors who intend to submit bids for Construction. For mail delivery, please call 951.955.Listed are all currently available notices inviting bids for County of Riverside Transportation Department public works projects. Note: All portions of this Bid Form must be completed, and the Bid Form must be signed before the Bid is submitted. BID SUBMITTAL All documents on page 5 through 11 must be submitted. The bid shall be delivered.