View Public Works' open solicitations, and learn more about how to register as a supplier and submit a bid or proposal. Preparation of Bid Documents: Bids must be submitted on the forms provided in these bid documents and prepared in the following manner: a.The standard purchasing process for Allegheny County involves: requisitioning; public solicitation; bid and proposal receipt; evaluation and contract award. BID BOND: Bid must include the required bid bond or certified check, which will be returned to the unsuccessful bidder.