Devils Slide - TunnelCast
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March 25, 2013: The long awaited Devil's Slide Tunnel on Highway 1 south of San Francisco opened to traffic after more than 5 years of excavation. The invitation-only opening ceremony drew several hundred people, many of them local residents who fought for the tunnel over several decades. Approximately 420,000yd3, or 21,000 truckloads of rock and dirt, were excavated to build the tunnels. The US$430 million tunnel project bypasses a stretch of US Highway 1 notorious for rockslides, land slippages and lengthy road closures. Congratulations to Caltrans; contractor Kiewit Pacific; tunnel designers ILF and HNTB; the construction inspection team of URS/Dr Sauer Group JV, and all of the men and women who worked on the tunnel.

Snapshot

Devil's Slide Tunnel opening day celebration

Paula Wallis reports for TunnelTalk
Location:
Northern California, San Mateo County
Dimensions:
Twin tubes, 1,250m long, 9m wide x
6.8m high, about 18m apart
Type:
Road
Contract Value:
$273 million
Method:
NATM/drill+blast
Owner:
Designer:
ILF, with final design by HNTB
Construction Management:
Caltrans
Construction Inspection:
URS/Dr Sauer Group JV
Contractor:
Kiewit Pacific
Waterproofing Subcontractor:
Wisko
Formwork Supplier:
Ceresola
Opened:
March 25, 2013
References
Progress at Devil's Slide - Jun 2008, Jan 2009
Pushing progress at Devils Slide - Feb 2010