Devils Slide - TunnelCast
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January, 2009: Kiewit Pacific has excavated 220m of the 386m north bore and 177m of the 372m south bore, plus the first three of 10 cross-passages. Ground conditions are as expected with crews currently working in support categories 3 and 4.
June, 2008: Four months into excavation from the south portals, contractor Kiewit Pacific was about 220m into the top heading in the north bound tube and 160m in the south bound tube.

Snapshot

NATM underway 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, roughly 18m apart
Type
Road
Contract Value
$273 million (estimate)
Method
NATM/drill and blast
Owner
Contractor
Construction Management
Caltrans
Construction Inspection
Designer
Anticipated Completion
2010