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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.
2019 Construction Specifications
The 2019 Standard Specification book is mandatory for use on projects advertised after October 1, 2019.
2017 Construction Specifications
The 2017 Standard Specification Book is for use after October 1, 2017 (but not after September 30, 2019).
2011 Construction Specifications
The 2011 Standard Specification Book is for use after May 3, 2011 (but not after September 30, 2017).
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