List of Seattle megaprojects

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	Cost	Notes
Sound Transit 3	Transit	In progress	$54 billion[1]	Divided between several projects, to open between 2024 and 2041
Vancouver B.C.–Seattle–Portland high-speed railway	Transit	Proposed	$24–$42 billion[2][3]	Initiative of the Pacific Coast Collaborative between state and provincial governments
State Route 520 bridge replacement and corridor program	Road	In progress	$4.56 billion[4]	New bridge opened in April 2016, rest of corridor anticipated to be complete by 2029
Alaskan Way Viaduct replacement tunnel	Road tunnel	Completed 2019	$4.25 billion (2009 est.)[5]
Amazon headquarters, Seattle	Office buildings	In progress	$4 billion[6]
East Link Extension	Transit line	In progress	$3.7 billion[7]	Scheduled to open in 2023
Lynnwood Link Extension	Transit line	In progress	$2.9 billion[8]	Scheduled to open in 2024
Interstate 405 (Eastside) improvements	Road	In progress	More than $2.8 billion[9]	2003 Nickel and 2005 Transportation Partnership Account: $1.5 billion; 2015 Connecting Washington package: $1.3 billion
Central Link, Seattle and Tukwila	Transit line	Completed 2009	$2.44 billion[10]
Spring District, Bellevue	Urban development	In progress	$2.3 billion[11]	Scheduled to open in phases from 2017 to 2023
Puget Sound Gateway (SR 167 and SR 509)	Road	In progress	$1.989 billion[12]
Northgate Link Extension	Transit tunnel	In progress	$1.9 billion[13]	Scheduled to open in 2021
Brightwater Tunnel	Sanitation infrastructure	Completed 2011	$1.8 billion[14]	First billion-dollar tunnel in Seattle
University Link tunnel	Transit tunnel	Completed 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]	Scheduled to be complete in 2022
Yesler Terrace redevelopment	Urban development	In progress	$1.5 billion[17]	May increase to $1.7 billion
Lincoln Square expansion, Bellevue	Urban development	Completed late 2017	$1.2 billion[18]
Seattle–Tacoma International Airport third runway	Airport infrastructure	Completed 2008	$1.1 billion[19]	Does not include $200 million in soundproofing for schools
Seattle seawall replacement	Shoreline infrastructure	Completed 2017	$1.07 billion (2014 estimate)[20]
Mount Baker Tunnel	Road tunnel	Completed 1986	Over $1 billion[21]	Earliest billion-dollar project on this list
Point Ruston	Urban development	In progress	$1 billion[22]
Snoqualmie Ridge	Master-planned community	Completed 2018	$1 billion[23]	Made suburb of Snoqualmie the fastest growing city in Washington (2010)
Hewitt Avenue Trestle replacement (U.S. Route 2, Everett)	Road bridge	Proposed	$620 million to $2 billion[24]
Puget Sound salmon recovery–culvert replacement	Stream restoration	In progress	$3.7 billion[25]	Began in 1991, expanded by June 2018 U.S. Supreme ruling in favor of tribal fisheries rights. Projected to continue through 2030.[25]

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[26]
• 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[27]
  • Third Powerplant (completed 1980) $2.002 billion in 2017 dollars[27]
• North Spokane Corridor (freeway): $1.49 billion[28]
• Lower Snake River Wind Project phase I and II (Tucannon River Wind Farm) $1.33 billion[29][30]
• Interstate 90 widening near Snoqualmie Pass: $1 billion[31]

See also

• List of megaprojects
• List of tunnels in Seattle

References

1. Beekman, Daniel (June 23, 2016). "Sound Transit puts $54 billion light-rail plan on ballot". The Seattle Times. Retrieved October 22, 2016.
2. Penner, Derrick (March 16, 2018). "Horgan puts up $300,000 to keep concept of Vancouver-Seattle-Portland high-speed rail alive". Vancouver Sun. Retrieved March 17, 2018.
3. CH2M Hill (February 2018). "Ultra High‐Speed Ground Transportation Study final report" (PDF). Washington State Department of Transportation. p. 5-12. Retrieved March 17, 2018.
4. "SR 520 – Budget and Performance". Washington State Department of Transportation. Retrieved April 17, 2016.
5. Lindblom, Mike; Sara Jean Green (January 13, 2009). "Gregoire announces tunnel plans; car-tab taxes might help pay for it". The Seattle Times. Archived from the original on January 15, 2009.
6. Day, Matt (January 26, 2018). "Take a look inside Amazon's Spheres as they get set to open". The Seattle Times. Retrieved February 5, 2018.
7. Lindblom, Mike (March 23, 2017). "Price tag zooms up for light rail across I-90 bridge: $225 million more needed". The Seattle Times. Retrieved February 5, 2018.
8. Lindblom, Mike (August 24, 2017). "Sound Transit's Lynnwood extension running $500M over budget". The Seattle Times. Retrieved February 5, 2018.
9. "I-405 Corridor Program". WSDOT. Retrieved February 5, 2018.
10. Lindblom, Mike (June 24, 2011). "Light-rail contract dispute is resolved". The Seattle Times. p. B1. Retrieved October 3, 2019.
11. Crowe, Melissa (May 6, 2016). "These are the 25-largest construction projects in the Puget Sound region". Puget Sound Business Journal. Retrieved November 30, 2016.
12. "Puget Sound Gateway Program: Funding and Phasing Subcommittee Meeting Summary" (PDF). Washington State Department of Transportation. October 4, 2017. Retrieved February 5, 2018.
13. Lindblom, Mike (August 17, 2016). "Underground sneak peek: Northgate-UW tunnel dig almost finished". The Seattle Times. Retrieved February 5, 2018.
14. Denise Whitaker (September 22, 2011). "Brightwater treatment plant set to open Saturday". Archived from the original on December 29, 2011.
15. Daniels, Chris; Green, Josh; Courtney, Ricky (March 19, 2016). "University Link light rail opens". KING-TV. Retrieved March 20, 2016.
16. "Tacoma/Pierce County HOV Program Annual Report" (PDF). Washington State Department of Transportation. August 2017. Retrieved February 5, 2018.
17. Beekman, Daniel (July 11, 2016). "Yesler Terrace transition: Many families leave area". The Seattle Times. Retrieved February 5, 2018.
18. Patti Payne (December 21, 2016). "Kemper Freeman: Lincoln Square expansion readies for 2017 rollout with new corporate tenants, restaurants". Puget Sound Business Journal.
19. Walt Crowley with research by Daryl McClary and Paula Becker (June 21, 2003), Sea-Tac International Airport: Third Runway Project, HistoryLink
20. Daniel Beekman (September 29, 2014). "With costs up, mayor wants to roll back Seattle waterfront plan". The Seattle Times. Retrieved February 5, 2018.
21. Holloway, Lee J; Kjerbol, Georg (1987). Kaplan, Elizabeth W. (ed.). "Completion of World's Largest Soft-Ground Tunnel Bore" (PDF). Transportation Research Record. US National Research Council Transportation Research Board. 1150: 1–10. ISSN 0361-1981.
22. Gillie, John (August 15, 2014). "Point Ruston development files claims totaling more than $150 million against Ruston". The News Tribune. Tacoma, Washington. Retrieved February 5, 2018.
23. Ellis E. Conklin (April 21, 2015). "How the Tech Sector's Moneyed Masses Reshaped a Historic Logging Village". Seattle Weekly.
24. John H. White, NWR Assistant Regional Administrator (January 18, 2018). "US 2 westbound trestle funding finance study" (PDF). Washington State Transportation Commission.
25. Aaron Kunkler (July 13, 2018), "Fish culverts ruling will increase price tag for the state: The state will be on the line for $3.7 billion for fish culvert replacements.", Kirkland Reporter
26. William F. Hamel (March 22, 2017). "Hanford Waste Treatment and Immobilization Plant – Rebaseline and Contract Modification Proposal Process / 2017 Project Management Workshop" (PDF). United States Department of Energy Office of River Protection. Retrieved February 5, 2018.
27. Lynne Brougher (March 29, 2017). "Grand Coulee FAQ". U.S. Bureau of Reclamation Public Affairs. Retrieved February 5, 2018.
28. "US 395 - North Spokane Corridor: Annual Mega-Project Report" (PDF). Washington State Department of Transportation. September 2015. Retrieved February 5, 2018.
29. Washington's Largest Wind-Power Site Begins Generating Electricity, Puget Sound Energy, February 29, 2012
30. "PGE completes Tucannon River Wind Farm", Power Engineering, December 16, 2014
31. Prager, Mikle (April 17, 2017). "Construction again slowing traffic over Cascades on I-90". The Spokesman-Review. Retrieved February 5, 2018.