In April 2006, a rockslide occurred at Ferguson Ridge in Mariposa County, California. The California Department of Transportation (Caltrans) established one-way traffic along SR 140, resulting in a stall as the prehistoric Ferguson Slide became active and buried the entirety of the route on May 25, 2006. Before the Ferguson Rockslide, SR 140 was a two-lane, undivided highway that connected various Mariposa County communities and provided access for millions of visitors to Yosemite National Park. Restoring two-lane access on SR 140 will eliminate delays for the movement of goods and materials and restore critical community and tourist-travel access.
Caltrans selected this SR 140 project for inclusion within the CMGC pilot program to select a Construction Manager / General Contractor to complete the work. Caltrans recognized both the unique challenges and collaborative efforts required to successfully manage the design and construction of the project. The project scope consists of two major segments of work:
- stabilizing the currently active talus of the slide to allow for the safe uncovering of the existing SR 140 alignment currently under slide material
- constructing a custom “rock shed” structure over the SR 140 alignment at the base of the slide
The rock shed will only be the second structure of its kind in California. It will allow for safe passage of vehicles through the rockslide area and mitigates further closures due to movement of the slide face.
Mission Critical’s Impact
Mission Critical’s work was essential to connecting the extensive and relevant experience of Myers-Wadsworth in the Western US and their ability to manage challenging environmental construction. Our daily collaboration with the team was a crucial component in identifying unique strengths and qualities. This combined effort enabled the Myers-Wadsworth team to stand out from the competition and capture this coveted CMGC contract.
Since the contract award, the SR 140 Ferguson Slide project has achieved two notable firsts:
- First Caltrans CMGC project to arrive at a successful and approved Guaranteed Maximum Price (GMP)
- First Caltrans CMGC project to begin construction activities since the authorization of the delivery method in 2012
Overall, the Mission Critical-Myers & Sons team has won two of the original six Caltrans CMGC pilot program projects, including the $52M SR 140 Ferguson Slide for Myers-Wadsworth JV and the $55M I-215 Barton Road Interchange with the Myers-Rados Joint Venture.