The City of San Diego provides you with direct access to bidding and contracting opportunities on all its construction projects. "Low-Bid" Design-Bid-Build: This contract delivery method is the most common type of contract awarded and is used for both large and small projects.Submit Bids –All bids must be submitted electronically via PlanetBids and are typically due at pm. How to Do Business with the Port Workshop Series. IV. BID PROPOSAL REQUIREMENTS: A. Bid Opening At: July 2, 2019 at p.