The tunnel “voids” affecting properties above the Link Light Rail tunnel path through the hill continue to be identified and addressed. From an article in the Engineering News-Record:
Crews have filled in about 80% of nine voids leftover from a 2-mile tunneling job through Seattle’s Beacon Hill. Japan’s Obayashi Corp. did not discover the voids while boring the parallel, 1-mile tunnels as part of its $280-million contract, which has since increased to $312 million. Owner Sound Transit contends the contractor is at fault.
. . .
“We put Obayashi on notice that we think this is an avoidable situation, and the cost is going to be withheld from its final payment,” Gray says. Sound Transit has spent $1.6 million filling the voids.
“The adequacy of the geotechnical data supplied by Sound Transit and the actual behavior of the ground during construction are under discussion with Sound Transit,” says Obayashi spokeswoman Carmen Stone.
And they’re not quite done yet: Sound Transit estimates about 430 cubic yards remain left to find and fill. Read the rest of the article at ENR.
via DouglasReiser on Twitter