Devils Slide - TunnelCast

February, 2010: Kiewit Pacific has excavated 960m in the northbound tunnel tunnel and 945m in the southbound bore, plus seven of 10 cross-passages on the 1,250m long tunnel. Ground conditions are as expected with crews currently working in support Category 1. The waterproofing installation and final lining is progressing behind the excavation.

Progress at Devil's Slide - TunnelCast, Jun 2008, Jan 2009
NATM underway at Devil's Slide - TunnelTalk, Mar 2008

Snapshot

Pushing progress at Devil's Slide

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
CalTrans
Designer
ILF
Construction Management
Caltrans
Construction Inspection
URS/Dr Sauer Group JV
Contractor
Kiewit Pacific
Waterproofing Subcontractor
Wisko
Formwork Supplier
Ceresola
Anticipated Completion
2011