Ferguson Rock Shed Project
Ferguson Slide Rock Shed Construction (10-0P921), Mariposa Talus Removal (10-0P922) and Ferguson Slide Talus Removal (10-0P923)
The California Department of Transportation (Caltrans), as assigned by the Federal Highway Administration, plans to restore the section of State Route 140 damaged by the Ferguson rockslide by constructing a protective shed.
The project construction has been split in two distinct construction projects. Phase 1 will remove the existing talus material and install cable net drapery to minimize additional rock fall. Phase 2 will be construction of a 675-foot rock shed structure on the same alignment.
The purpose of this project is to restore full access to SR-140 providing a reliable route within the limits of the Ferguson Slide area and to keep SR-140 open to vehicular and bicycle traffic, including large commercial trucks, emergency vehicles, and recreational vehicles.
The project is needed because access to Yosemite National Park and the community of El Portal has been severely restricted resulting in significant economic losses.
Currently, motorists use a temporary bypass route to travel this portion of SR-140. Restoration of SR-140 would eliminate inconvenient detours and extended commute times for residents, businesses, and workers in the area. Restoration of the route would also give travelers a direct route to Yosemite National Park and other destinations along SR-140.
Phase 1, Talus removal:
- Contract approval – February 2021
- Begin construction – March 2021
- Trim blasting operations – April-May 2021
- Contract awarded for $22.7M to Meyers & Sons/RL Wadsworth
- Use of real-time slide monitoring equipment
- Use of remote-controlled equipment
- Comprehensive safety plan on determining how to work within in the slide zone relative to current slide conditions
- Removed 320,000 tons of material
- Installed 22 rock drains into the slide
- End construction – Summer 2023
Phase 2, Rock Shed:
- Begin construction – Summer 2024
- Construction duration – 5 years
- Estimate construction cost – $285,000,000 (Delivered through four contracts)
Rock Shed Details:
- First rock shed to be constructed by jacking pre-cast concrete segments around a curve
- Consists of 11 pre-cast concrete segments
- Length is approximately 675 feet
- Interior width is 40 feet
- Restraining base is anchored by 200 rock anchors and 400 concrete micro piles.
Caltrans District 10 - Public Information Office
Phone: (209) 948-7977
Title VI Information
The California Department of Transportation (Caltrans) assures that no person shall, on the basis of race, color, or national origin, be excluded from participation in, be denied the benefits of, or be otherwise subjected to discrimination under any program or activity receiving Federal financial assistance, as required by Title VI of the Civil Rights Act of 1964, as amended, the Civil Rights Restoration Act of 1987, and Federal Executive Order 12898 (Federal Actions to Address Environmental Justice in Minority Populations and Low-Income Populations).
Caltrans will make every effort to ensure nondiscrimination in all of its programs and activities, whether they are federally funded or not, and that services and benefits are fairly distributed to all people, regardless of race, color, or national origin. In addition, Caltrans will facilitate meaningful participation in the transportation planning process in a nondiscriminatory manner.