EVALUATION OF DESIGN BUILD PRACTICE IN COLORADO, IR(CX)70-4(143)

This final report summarizes the activities that took place on a design-build project in Region I of the Colorado Department of Transportation (CDOT). Under the Special Experimental Project No. 14 (SEP 14), the Federal Highway Administration approved the design-build concept to be used for the 12 mi (19.3 km) reconstruction of I-70 east of Denver. Included in this report are an overview of the design-build concept, discussion of significant events, and results of a questionnaire on design-build methodology. Also included in the report are a description of all the construction modification orders (CMO) and a discussion of quality control/quality assurance processes. The ultimate goal of this study was to identify and document the pros and cons of the design-build practice and to examine its overall applicability to CDOT.