GEO-volution- The Evolution of Colorado s Geological and Geotechnical Engineering Practice contains 14 summary papers and practical case studies, presented at the 2006 bicentennial Geotechnical Seminar in Denver, Colorado on November 10, 2006, that describe how the state of the geo-practice evolved in Colorado. The papers offer perspective on Colorado s unique geology, geotechnical and geological engineering for the challenging ground conditions present in Colorado, emerging trends in the local engineering practice, and current solutions to Colorado s diverse geo-problems.