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Caldecott Tunnel fourth bore opens Map of California State Route 24 Oakland
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Seismic Retrofit (5)   280 Construction (4)   South of Market Road Construction   Caltrans (52)   Caldecott (10)

Good Economic News Main Event: NB Highway 28...
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1. 2014-09-01 280 seismic repairs finished, northbound lanes reopened South of Market
2014-08-28 NB Highway 280 closed for seismic retrofit South of Market
D. 2014-08-08 Overnight closures of Caldecott eastbound bore Caldecott tunnel, Orinda
4. 2014-07-06 Caltrans completed work on stretch of Interstate 280 San Francisco
F. 2013-11-16 Caldecott Tunnel fourth bore opens Oakland Hills
G. 2011-12-01 Breakthrough for Caldecott Tunnel's bore Caldecott Tunnel, Orinda
H. 2010-08-09 Drilling Begins On New Caldecott Bore Orinda
I. 2010-01-10 Caldecott 4th Bore Construction Begin 24
9. 2007-05-24 Maze Reopens Despite Expert's Doubts West Oakland

Overnight closures of Caldecott eastbound bore Map of Caldecott tunnel Orinda  Orinda: Motorists can expect delays during overnight closures of an bore of Highway 24 tunnel from Oakland to Orinda over the next two weekends   Caltrans completed work on stretch of Interstate 280 Map of Interstate 280 San Francisco
280 seismic repairs finished, northbound lanes reopened Map of Interstate 280 San Francisco  South of Market: All northbound lanes of I-280 in San Francisco from the 101 split to the King Street off-ramp have reopened before the Tuesday morning deadline NB Highway 280 closed for seismic retrofit Map of Interstate 280 San Francisco


year 2014 Top ^

Sep.1
Aug.28
  South of Market: Northbound Interstate 280 will remain closed through the Labor Day weekend as large sections of the highway are removed and new hinges are installed
Aug.8
Jul.6
  San Francisco: Crews worked for more than 100 hours uninterrupted. Caltrans was able to reopen the roadway about 10 hours ahead of schedule



year 2013 Top ^

Nov.16
  Oakland Hills: The long-awaited fourth bore of the tunnel opened to westbound traffic after emergency systems were tested and certified
 Signs reading 'Welcome to the 4th Bore' greeted predawn commuters beginning about 4 a.m.


year 2011 Top ^

Dec.1 Breakthrough for Caldecott Tunnel's bore
Map of Caldecott Tunnel Orinda  Orinda: Construction crews digging from the east and the west broke through about 650 feet from the Oakland side and 2,500 feet from the Orinda end

year 2010 Top ^

Aug.9 Drilling Begins On New Caldecott Bore
Map of California State Route 24 Orinda
  Orinda: Crews began drilling into the mountainside near Orinda as work got underway excavating the fourth bore by the 130-ton, 50-foot-long machine
Jan.10 Caldecott 4th Bore Construction Begin
  24: The Improvement Project will construct a fourth tunnel to connect Alameda and Contra Costa counties to help alleviate traffic congestion


year 2007 Top ^

May.24   Maze Reopens Despite Expert's Doubts
Map of Interstate 580 Oakland  West Oakland: A portion of the MacArthur Maze reopened just 25 days after the accident, but one expert raised questions about the safety of the new structure May.3   Caltrans Begins Contractor Selection
Map of Interstate 80 Oakland  Oakland: Caltrans: The collapsed 580 freeway connector may reopen in just a few weeks




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