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Topic: bertha

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December 16, 2014 at 1:09 PM

Digging to resume at Bertha’s repair vault

Seattle Tunnel Partners got the green light to resume digging Tuesday night in front of Bertha, the stranded boring machine for the Highway 99 tunnel project. The state ordered the contractors late Friday to stop excavating an access vault, and write an emergency plan that would allow them to safely stop groundwater pumping — in the…

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December 12, 2014 at 5:00 PM

Seattle’s most famous road crack filled Friday

A long crack on South King Street, which may or may not have been deepened by the Highway 99 tunnel project,  was filled with asphalt Friday. “It’s just like a pothole repair,” said Rick Sheridan, spokesman for the Seattle Department of Transportation.  The fix followed findings by Seattle Tunnel Partners, using ground-penetrating radar, that there are…

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December 9, 2014 at 5:57 PM

Actually, digging continued Tuesday at Bertha’s repair pit

Despite this week’s scare about soil settlement in Pioneer Square, excavation continued Tuesday at the access vault that will be used to reach stalled tunnel machine Bertha. Seattle Tunnel Partners removed three feet and has now reached 84 feet depth, for the 120-foot deep shaft, the Washington State Department of Transportation said Tuesday afternoon. Progress can be…

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December 5, 2014 at 2:41 PM

Viaduct and soil sink near stranded Bertha

Update, 9:40 p.m.| Read transportation reporter Mike Lindblom’s full story on the problem, and what officials say it could mean for the Highway 99 tunnel project. Original post | The Alaskan Way Viaduct and nearby soil have sunk 1.2 inches this fall alongside stranded tunnel machine Bertha, senior state engineers said Friday afternoon. The settling shows that…

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November 3, 2014 at 3:11 PM

Excavation to tunneling machine resumes; no artifacts found

Archaeologists have seen enough 19th-century shell deposits that they can let heavy excavation resume at Seattle’s Pioneer Square waterfront, where workers are digging an access pit to reach buried tunnel-boring machine Bertha. Seattle Tunnel Partners was given permission Sunday to continue digging the 120-foot-deep vault, after stopping work Oct. 23, the state Department of Transportation announced…

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October 31, 2014 at 9:04 PM

New tunnel-machine bearing arrives from Japan

Hitachi built a new seal ring in Japan for its stranded tunnel-boring machine, and it arrived Friday at Seattle’s Terminal 46. The state Department of Transportation tweeted photos of new seal ring, as well as the new bearing. Previously, Seattle Tunnel Partners (STP) said it kept a spare bearing, a requirement of its $1.44 billion contract to…

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October 29, 2014 at 4:02 PM

Shells in Bertha’s repair vault likely from settlers’ oyster business

Old shells discovered within tunnel machine Bertha’s repair pit likely were not left by Native tribes, but by white settlers who removed oyster meat and left shell piles behind, officials say. Allyson Brooks, state historic preservation officer, said Wednesday the shells are mostly from small Olympia oysters that grew far from Elliott Bay, and later…

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October 28, 2014 at 5:26 PM

Archaeologists start shell study at Highway 99 tunnel site

Archaeologists began an investigation Tuesday afternoon alongside stranded tunnel machine Bertha, where a deposit of shells appeared last week roughly 20 feet below street level. The shells turned up while workers were excavating a 120-foot-deep vault that will be used this winter to lift away the machine’s front end so it can be repaired. The shells…

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October 23, 2014 at 6:41 PM

Work on Bertha’s repair pit halted after shell-material discovery

Digging work for tunnel machine Bertha’s repair access vault was stopped Thursday after archaeologists monitoring the excavation found a deposit containing shell material. The discovery may indicate the presence of cultural materials and requires further evaluation, according to the Washington State Department of Transportation. Though no artifacts or human remains were found, the department follows…

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October 23, 2014 at 7:44 AM

A real scoop: excavation under way at Bertha’s repair pit

Crews had dug down nearly 20 feet as of Wednesday afternoon, as they make a 120-foot-deep vault where tunnel machine Bertha’s front end can be cut open for repairs. Digging started late last week and will continue through November, until about 20,000 cubic yards of soil is removed from within a deep concrete ring that was built this…

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