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Welcome & General Information

Thank you for your interest in our highway and bridge construction projects. The Rules Governing Construction Bidding for CDOT Public Projects ('the Rules"), 2 CCR 601-10, amended July 2018, govern all bids. If you have questions on bid rules or the project records, please contact RB Simmons at 303-757-9416 or Tracie Benton at 303-757-9354. 

General contractors must be registered and prequalified with CDOT to participate in the bids, please see our prequalification application at Darrell Wells is available for any questions you may have regarding prequalification at 303-757-9215. 

Our design-bid-build projects are procured with electronic bids exclusively on this website. To enter a proposal, you must obtain a Digital ID with Bid Express for an authorized agent identified on your CDOT prequalification application. To sign up for electronic bidding or if you have technical difficulties on the Bid Express web site or with the Project Bids software, please contact Bid Express Customer Support, 888-352-BIDX (2439) or email them at

Plans and Specifications

We now have plans and specifications for all advertised projects at You must be registered on the system to see these documents. You will find them in the View menu of the Dashboard, under the "My Bid Solicitations" menu. While you view the plans and specs you can join the main Plan Holders List for CDOT. Bid Express, this site, also allows contractors to voluntarily join a Bid Express Plan Holders List.  

Notice to E-Bidders

The software required to read the electronic bid files is available at https// Please create a user profile and hit "enter" once you complete all of the fields.

CDOT wishes to notify all bidders that the Department will affirmatively ensure that for any contracts entered into pursuant to the advertisements we post, disadvantaged business enterprises will be afforded full and fair opportunity to submit bids in response to our invitations. No bidders will be discriminated against on the grounds of race, color, national origin in the consideration for award in accordance with the provisions of Title VI of the Civil Rights Act of 1964 (78 Stat. 525, 42 USC). 

CDOT, in accordance with the provisions of Title VI of the Civil Rights Act of 1964 (78 Stat. 252, 42 U.S.C.  ยง 2000d to 2000d-4) and the associated Regulations, hereby notifies all bidders that it will 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 consideration for an award.

The work on our projects is vital to the health of Colorado's economy and the traveling public's quality of life. We look forward to working with you.

What's New?

What's New Table. What's New Table lists the last 50 activities that happened in regards to the lettings
Letting Proposal Activity Activity Date
20220818 002 - C24142 New Proposal Added 07/28/2022
002 - C24142 1 New Attachment - C24142.pdf 07/28/2022
002 - C24142 364 Plan Sheets Added 07/28/2022
003 - C24935 New Proposal Added 07/28/2022
003 - C24935 1 New Attachment - C24935.pdf 07/28/2022
003 - C24935 212 Plan Sheets Added 07/28/2022
002 - C24142 User deleted all (364) plan sheets for letting 20220818 and proposal C24142. (Plan set C24142-planset.pdf) 07/28/2022
002 - C24142 478 Plan Sheets Added 07/28/2022
20220825 001 - C23444 1 New Attachment - 23444rv1.docx 07/19/2022
001 - C23444 3 Plan Sheets Added 07/19/2022
20220804 001 - C24415 255 Plan Sheets Added 07/14/2022
002 - C24738 244 Plan Sheets Added 07/14/2022
20220818 001 - C21415 867 Plan Sheets Added 07/14/2022
20220825 001 - C23444 249 Plan Sheets Added 07/14/2022
20220818 Letting Made Available 07/14/2022
20220825 Letting Made Available 07/14/2022
20220804 Letting Made Available 07/14/2022
(17 Activities) More... Searching...


Bid Express: New Roads

Bid Express: New Roads is a series of updates aimed at creating a more personalized experience that better caters to individual needs, jobs, and responsibilities.

Over the coming months, we'll be rolling out redesigned experiences to you across the entire service. Learn more.

Don't worry, if you don't love it, you can switch back to classic Bid Express for a limited time while you get used to the new look.

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