The adventure of Bertha the tunnel-boring machine, already two years behind schedule, has a new twist.
Mike Lindblom reports: "Gov. Jay Inslee ordered Highway 99 tunnel contractors Thursday to suspend drilling the deep-bore tunnel along the Seattle waterfront, until a sinkhole that formed this week is fully investigated."
Though the sinkhole has been filled, ground above the Bertha tunnel-boring machine is continuing to sink, according to the Washington State Department of Transportation (WSDOT). "But in calling for the work to stop, the governor aired the worry shared by many citizens — that if Seattle Tunnel Partners (STP) continues to dig too much soil as Bertha proceeds north, the viaduct and downtown buildings could be threatened," according to Lindblom.
The article includes details about how the steps the state is taking to inspect the project while its suspended. The state's actions reflect a new twist in its relationship with contractors on the project. More also can be found on the document announcing the suspension of the project.
FULL STORY: Inslee orders tunnel dig halted as soil sinks above Bertha
Another, Final(?) Delay for Alaskan Way Viaduct Replacement
The Washington Department of Transportation announced that Seattle's Alaskan Way Viaduct will close permanently in January 2019, with service switching over the tunnel Bertha built. The previous plan expected the switch to occur in the Fall.
Bertha Awakens—New Hope After a Two-Year Delay for Seattle Tunnel-Boring Machine
Baby steps are an improvement for the tunnel-boring machine known as Bertha. The drill moved a total of 1.5 feet this week, but the symbolic distance probably felt like a mile.
Seattle's Most Dramatic Traffic Reduction Will Occur Next Month
There will be no road closures, no traffic bans, no loss of parking, and no new transit lines opening. Call it the "tolling effect" on Nov. 9 when motorists have to pay to drive through the two-mile State Route 99 tunnel that opened last February.
National Parks Layoffs Will Cause Communities to Lose Billions
Thousands of essential park workers were laid off this week, just before the busy spring break season.
Retro-silient?: America’s First “Eco-burb,” The Woodlands Turns 50
A master-planned community north of Houston offers lessons on green infrastructure and resilient design, but falls short of its founder’s lofty affordability and walkability goals.
Delivering for America Plan Will Downgrade Mail Service in at Least 49.5 Percent of Zip Codes
Republican and Democrat lawmakers criticize the plan for its disproportionate negative impact on rural communities.
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Balancing Bombs and Butterflies: How the National Guard Protects a Rare Species
The National Guard at Fort Indiantown Gap uses GIS technology and land management strategies to balance military training with conservation efforts, ensuring the survival of the rare eastern regal fritillary butterfly.
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