Highway & Bridge Construction Bidding

Information for bidding on highway and bridge construction projects for the State of Colorado

This page provides access to information on upcoming highway construction bids, bidding rules, prequalification, results of past bids and various electronic bidding resources. 

See our Bidding Rules along with the Chief Engineer's Delegation of Authority for the bid requirements for Highway & Bridge Construction projects.

Project Bids is the software used to facilitate the bidding process.  This software allows bidders to receive proposal item schedules and submit bids in a secure, electronic environment. Project Bids also tracks Disadvantaged Business Enterprise (DBE) commitments, automates calculations and applies amendments. Download Project Bids. Installing this software will allow you to view a project's schedule which can be found on the Current and Future Bidding Opportunities page.

CDOT does not accept paper bids for Highway and Bridge Construction projects. All bid proposals for the construction projects must be submitted electronically via Bid Express. For help with Bid Express, please contact a customer service representative at 1-888-352-2439, or at [email protected].

NEW: CDOT now offers electronic plans and specifications to contractors at B2G. Please be sure to do an account lookup if you are new to the system. Our plan holders list now resides on this site. Find the list by going to the "view" menu, "my bid solicitations" then by project. Contractors who want quotes from other contractors are advised to add your name to the plan holders list on this site. To access the plan holder list, and or the plans and specs you only need to have an account in the B2G system.  

All Prime Contractors must be prequalified to participate in the bids in accordance with the Bidding Rules(Subcontractors do not need to be pre-qualified in the B2G system). Please complete the prequel application at this link in B2G at least 17 calendar days before any bid opening for which you wish to submit a proposal. Should you be unable to do so 17 or more days prior to opening, please contact our prequalification administrator Danielle Mire at 303-757-9418 to verify if the application process can be expedited. Starting November 1, 2022, if you want to get pre-qualified for providing professional engineering services please go to the B2G system. 

Vendors interested in providing personal services or materials to CDOT are invited to visit our Procurement Supplier page.

Please also see our Innovative Contracts: Design-Build and CM/GC Projects for additional projects under advertisement.

The plan holder's list, specifications and design drawings can now be seen and downloaded for free by contractors with an open account in B2G.

To report the site being down, please call the our help desk at 303-239-4357.

Required Posters for Job Site Bulletin Boards can be accessed from the link: CDOT's Construction Compliance

CDOT Internal Use: Ad Letters Revision Letters