Sept. 01--Here is the latest information from Sound Transit on the light rail construction project in Seattle that will extend the present 14-mile line, between Seattle-Tacoma International Airport and downtown, north to the Northgate area near 105th Street.
Included will be underground stations on Capitol Hill, at the University of Washington (near Husky Stadium) and in the University District.
From Sound Transit:
The tunnel boring machine building the northbound light rail tunnel has already traveled more than 1,600 feet from the Maple Leaf Portal. Crews are currently hauling muck from the portal site from 4:30 p.m. to 2:30 a.m. to avoid conflicting with a Seattle Public Utilities project on Fifth Avenue N.E.
Crews expect the boring machine to reach Roosevelt Station (at 65th Street) in early 2015. A second machine will begin working on the southbound tunnel in a few months.
Signed detours will be in place around water line work in the intersection of N.E. 65th Street and 12th Avenue N.E. near Roosevelt Station for approximately three weeks starting in mid-September. The detours will be in place from 7 a.m. to 3 p.m. weekdays.
The Roosevelt Station construction site is now home to a 170-foot-tall tower crane. Crews moved the Kroll 1800 to Roosevelt from the Capitol Hill Station site. The crane will be used to load equipment and supplies in and out of the station box. The approximately 285 foot jib (or arm) can lift more than 16 tons at a time. The crane will be a Roosevelt fixture for at least two years.
Construction at U District Station has shifted from drilling to digging. Crews began drilling 230 piles around the perimeter last April. The 40- to 120-foot-deep piles were reinforced with support beams, concrete and rebar.
Now that the piles are in, crews are excavating the station box. As crews dig down, wood lagging will be installed between piles to form shoring walls. Shoring walls will form the sides of the station box. Excavation for U District Station will reach as deep as 95 feet. Excavation will continue through spring 2015.
Seattle is also building a street car line from the south end of downtown's International District up First Hill to Capitol Hill.
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