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 registered 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. Remember to register to see this list and the plans/specs. 

All contractors must be prequalified to participate in the bids in accordance with the Bidding Rules. Please register and complete our prequal application at this link: 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, Darrell Wells, at 303-757-9215 to verify if the application process can be expedited.  If you are trying to get pre-qualified for professional and engineering services please go to our Supplier Self Service (SuSS) Portal.

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 CDOT Plans Room is closed, the plan holder's list, specifications and design drawings can now be seen and downloaded for free by registered users at B2G.

CDOT, in accordance with the provisions of Title VI of the Civil Rights Act of 1964 (78 Stat. 252, 42 US.C. §§ 2000d to 2000d-4) and the associated Regulations, hereby notifies all bidders that it will affirmatively ensure that for any contract entered into pursuant to our advertisements, disadvantaged business enterprises will be afforded full and fair opportunity to submit bids in response to this invitation and will not be discriminated against on the grounds of race, color, or national origin in award consideration.

To report the site being down, please call the our help desk at 303-239-HELP(4357), then select 2 & 2.

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

CDOT Internal Use: Ad Letters Revision Letters