The 2021 Standard Specification book is mandatory for use on projects advertised after October 1, 2021. Consultants and Contractors will have to print and assemble this Specification book on their own.
Construction Specifications
CDOT's Headquarters and Region 1 building are at 2829 W. Howard Place, Denver, CO 80204. Please update this address in all documents that contain our former address (4201 E. Arkansas Ave. Denver, CO 80224). Thank you.
The 2019 Standard Specification book is mandatory for use on projects advertised after October 1, 2019 until September 30, 2021.
The 2017 Standard Specification Book is mandatory for use on projects advertised after October 1, 2017 but NOT after September 30, 2019.
The 2011 Standard Specification Book is mandatory for use on projects advertised after May 3, 2011 but NOT after September 30, 2017.