Colorado has has broad authority to use design-build for public procurement of public projects.
2007 legislation:
HB 1342 (pdf)
The bill authorizes state agencies, county and municipal governments, and specified special districts (public entities) to award contracts for specified public projects using integrated project delivery methods, or a project delivery method in which there is a contractual agreement between an agency and a single contract bidder for the design, construction, alteration, operation, repair, improvement, demolition, maintenance, or financing or any combination of these services, for a public project.
Introduced 3/09/2007
Signed into law: (PDF Text)
On June 1, 2007, Colorado Governor Ritter signed into law HB 1342, Integrated Project Delivery Methods and Public Projects. It will become effective in August, 2007. The new law authorizes state agencies, county and municipal governments, and specified special districts (public entities) to award contracts for specified public projects using integrated project delivery methods, or a project delivery method in which there is a contractual agreement between an agency and a single contract bidder for the design, construction, alteration, operation, repair, improvement, demolition, maintenance, or financing or any combination of these services, for a public project.