The City's current and past bids, including all bid documents, questions and answers, addenda, and final results, are available on Biddingo. We manage all vendors and subcontractors on construction sites, always handling the responsibility of finishing each project within the agreed-upon timeline.Get competitive quotes for your project. License Requirement: Class A General Engineering Contractor. Prevailing Wage is Required. The Bidder has submitted with this Bid Proposal the following: (a) Bid Security; (b) Proposed Subcontractors Form; (c) Non-Collusion.