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Sanitation infrastructure Completed in 2011 $1.8 billion [14] First billion-dollar tunnel in Seattle University Link tunnel: Transit tunnel Completed in 2012 $1.7 billion [15] Completed $200 million under budget. Central Link light rail service began in 2016. Interstate 5 HOV lanes in Tacoma and Fife Road expansion In progress $1.6 billion [16]
Renton Sewer Tunnel ETS-6 12 ft (3.7 m) O.D. 1,056 ft (322 m) First use of Earth Pressure Balance Machine in Seattle [1] 1987–1988 Downtown Seattle Transit Tunnel: Twin 21.25 ft (6.48 m) 13,624 ft (4,153 m) Tunnelling shield First use of waterproofing PVC membrane in USA [1] 1990 Fort Lawton Tunnel/West Point Sewer 15.5 ft (4.7 m) O.D.
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Seattle Public Utilities (SPU) is a public utility agency of the city of Seattle, Washington, which provides water, sewer, drainage and garbage services for 1.3 million people in King County, Washington. [3] The agency was established in 1997, consolidating the city's Water Department with other city functions. [4]
The location of the state of Washington in the United States of America Grand Coulee Dam has long been emblematic of infrastructure in the State of Washington, and is one of two dams mentioned in the official state folk song, Roll On, Columbia, Roll On". But its scale has been eclipsed by several 21st century infrastructure projects.
West Point is one of three major wastewater treatment plants in the area, alongside the South and Brightwater plants. The plant serves Seattle, Shoreline, and other surrounding areas of King County and Snohomish County. Some sewers draining to West Point are combined sewer systems, which carry both wastewater and stormwater.
English: An outline map shading the Seattle–Tacoma–Bellevue MSA (teal) and the Seattle–Tacoma–Olympia CSA (gold) This is a retouched picture , which means that it has been digitally altered from its original version.
Communities surrounding Seattle dumped wastewater into Lake Washington, contaminating it as well. [2] In 1958, voters created the Municipality of Metropolitan Seattle (Metro) to address this problem. [3] Two treatment plants were planned, South Treatment Plant and the West Point Treatment Plant in Seattle. The plant broke ground in 1961, on ...