The Bid Letting Unit is responsible for construction project advertisements, assisting with electronic bidding, fulfilling requests for eligibility to bid. This page is where the public copy of bidder submissions are posted for public review.MITN participating local government purchasing departments invite vendors to register for exclusive access to RFPs, bids and awards on the bid system. PlanHub allows you to see the current projects available for bid throughout Michigan. Find out the process to bid or create a proposal with the City. Quick, comprehensive access to construction projects in Michigan for bid, including exclusive projects, plans, specs, bidder lists, and project details. Bids shall be publicly opened and read aloud at a date, time, and place designated in the invitation to bid.