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The State Route 99 tunnel, also known as the Alaskan Way Viaduct replacement tunnel, is a bored highway tunnel in the city of Seattle, Washington, United States.The 2-mile (3.2 km), double-decker tunnel carries a section of State Route 99 (SR 99) under Downtown Seattle from SoDo in the south to South Lake Union in the north.
Freighter Fairpartner carrying the disassembled tunnel boring machine into the Port of Seattle in April 2013. Bertha was designed and manufactured by Hitachi Zosen Sakai Works of Osaka, Japan, and was the world's largest earth pressure balance tunnel boring machine, [14] at a cutterhead diameter of 57.5 feet (17.5 m) across.
The backside of Bertha the tunnel boring machine and the unfinished interior of the SR 99 tunnel, seen in January 2017. After the demolition of the viaduct's southernmost stretch and its lanes were realigned onto an adjacent bypass in 2012, crews began excavation of a 420-foot-long (130 m) launch pit to house the tunnel boring machine. [195]
The Alaskan Way Viaduct ("the viaduct" for short) [1] [2] [3] was an elevated freeway in Seattle, Washington, United States, that carried a section of State Route 99 (SR 99). The double-decked freeway ran north–south along the city's waterfront for 2.2 miles (3.5 km), east of Alaskan Way and Elliott Bay, and traveled between the West Seattle Freeway in SoDo and the Battery Street Tunnel in ...
Large trucks and tour buses will pay a congestion charge of $21.60 alongside any bridge or tunnel costs during peak periods, defined as 5 a.m. to 9 p.m. weekdays and 9 a.m. to 9 p.m. on weekends.
Caltrans hopes to have the bulk of the Merced SR-99 Pavement Rehabilitation Project done by Memorial Day. ... eliminating the “tunnel lane” that had plagued drivers for more than two years.
But the bridges and tunnel cost between $6 million and $11 million, much more than the price of paving a few miles of new trail. ... While the cost of bridges is high, state and federal grants ...
A combined state department of transportation was proposed in the mid-1960s and gained the support of Governor Dan Evans. [10] Charles Prahl, who resigned as head of the Department of Highways, criticized the Evans administration's proposal to create a transportation "superagency" and the prioritization of rapid transit in plans for the urban transportation system of Seattle. [11]