Colo. Rev. Stat. § 43-1-1404
(1) The department may use a design-build contract for a transportation project if the design work for such project must be performed before a potential bidder can develop a price or cost proposal for such project and if the chief engineer of the engineering, design, and construction division determines that using a design-build contract is appropriate. The chief engineer shall consider the following factors in making a determination pursuant to this subsection (1):
Source: L. 99: Entire part added, p. 258, § 1, effective April 9.