Big Oak Flat Tunnel No. 3, Yosemite Park, CA

Big Oak Flat Tunnel No. 3, Yosemite Park, CA

Big Oak Flat Tunnel No. 3, Yosemite Park, CA

Big Oak Flat Tunnel No. 3, Yosemite Park, CA

 
Big Oak Flat Tunnel No. 3, Yosemite Park, CA

AVA's Role
Designed of a drainage system to divert water seeping from the north face of the tunnel and flooding the roads.

 
Client
National Park Service, Denver, CO

Project Description
This tunnel spans the main access road into Yosemite Park and consists of 3 sections of concrete lining and 2 sections of gunnite finish. Over the years water has collected behind the concrete tunnel lining and seeped through the joints between the concrete lining and gunnite. This caused water to flow from the north face of the tunnel to the south face causing hazardous driving conditions especially during winter due to formation of ice. AVA designed a draining system to divert the water from the north face to a culvert running along the south face of the tunnel.


Cost
$200,000

Status
Completion date: 2004

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