This is a list of megaprojects in the Seattle area. For this list, a megaproject follows the often cited definition of $1 billion (2017 dollars) or more.
Name Type Status CostNotes Sound Transit 3 Transit $54 billion Divided between several projects, to open between 2024 and 2041 Vancouver B.C.–Seattle–Portland high-speed railway Transit Initiative of the Pacific Coast Collaborative between state and provincial governments State Route 520 bridge replacement and corridor program Road $4.56 billion New bridge opened in April 2016, rest of corridor anticipated to be complete by 2029 Alaskan Way Viaduct replacement tunnel Road tunnel $4.25 billion (2009 est.) Amazon headquarters, Seattle Office buildings $4 billion East Link Extension Transit line $3.7 billion Scheduled to fully open in 2025 Lynnwood Link Extension Transit line $2.9 billion Interstate 405 (Eastside) improvements Road 2003 Nickel and 2005 Transportation Partnership Account: $1.5 billion; 2015 Connecting Washington package: $1.3 billion Central Link, Seattle and Tukwila Transit line $2.44 billion Spring District, Bellevue Urban development $2.3 billion Scheduled to open in phases from 2017 to 2026 Puget Sound Gateway (SR 167 and SR 509) Road $1.989 billion Northgate Link tunnel Transit tunnel $1.9 billion Brightwater Tunnel Sanitation infrastructure $1.8 billion University Link tunnel Transit tunnel $1.7 billion Completed $200 million under budget. Central Link light rail service began in 2016. Interstate 5 HOV lanes in Tacoma and Fife Road expansion $1.6 billion Scheduled to be complete in 2022 Yesler Terrace redevelopment Urban development $1.5 billion May increase to $1.7 billion Lincoln Square expansion, Bellevue Urban development $1.2 billionSeattle–Tacoma International Airport third runwayAirport infrastructure$1.1 billionDoes not include $200 million in soundproofing for schools Seattle seawall replacement Shoreline infrastructure $1.07 billion (2014 estimate)Mount Baker TunnelRoad tunnelEarliest billion-dollar project on this listPoint RustonUrban development$1 billionSnoqualmie RidgeMaster-planned community$1 billionMade suburb of Snoqualmie the fastest growing city in Washington (2010)Hewitt Avenue Trestle replacement (U.S. Route 2, Everett)Road bridgePuget Sound salmon recovery–culvert replacementStream restoration$3.7 billionBegan in 1991, expanded by June 2018 U.S. Supreme ruling in favor of tribal fisheries rights. Projected to continue through 2030.
Other Washington state megaprojects Notable Washington state megaprojects outside the immediate Seattle area include the following:
Hanford cleanup $113.6 billion Hanford Vitrification Plant $12 to $16.8 billion WNP-3 and WNP-5 nuclear power plants up to $24 billion estimated to complete (cancelled, WPPSS default) Grand Coulee Dam $5.541 billion in 2017 dollars Third Powerplant (completed 1980) $2.002 billion in 2017 dollars North Spokane Corridor (freeway): $1.49 billion Lower Snake River Wind Project phase I and II (Tucannon River Wind Farm) $1.33 billion Interstate 90 widening near Snoqualmie Pass: $1 billion
See also List of megaprojects List of tunnels in Seattle
References