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America's most expensive megaprojects

Incredible megaprojects that cost billions
29. Golden Gate Bridge: $767 million
28. Wekiva Parkway: $1.6 billion
=26. Extension 470: $2.6 billion
=26. First Transcontinental Railroad: $2.6 billion
=24. Hoover Dam: $2.7 billion
=24. Alaska Highway: $2.7 billion
23. I-95 New Haven Harbor Corridor Reconstruction: $2.8 billion
22. Verrazzano-Narrows Bridge: $3.1 billion
21. Maryland Route 200: $3.2 billion
=18. I-4 Ultimate: $3.4 billion
=18. Crescent Corridor: $3.4 billion
=18. Yankee Stadium: $3.4 billion
17. Woodrow Wilson Bridge: $3.5 billion
=15. Ohio River Bridges Project: $3.7 billion
=15. Mon/Fayette Expressway: $3.7 billion
14. Interstate 69 Extension: $4 billion
=12. Alaskan Way Viaduct Replacement Tunnel: $4.1 billion
=12. I-10 Katy Freeway Expansion: $4.1 billion
11. Central Texas Turnpike: $4.8 billion
10. One World Trade Center: $5.1 billion
9. Second Avenue Subway Phase 1: $5.8 billion
8. Evergreen Point Floating Bridge and HOV program: $5.9 billion
7. Silver Line Extension: $6.5 billion
6. LaGuardia Airport Redevelopment: $8.6 billion
5. San Francisco–Oakland Bay Bridge Eastern Span Replacement: $8.8 billion
4. Bay Area Rapid Transit: $12.1 billion
3. East Side Access: $12.4 billion
2. Central Artery/Tunnel Project: $22.5 billion
1. Trans-Alaska Pipeline System: $41.7 billion
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Incredible megaprojects that cost billions

America doesn't do megaprojects by halves, investing years – sometimes even decades – and billions of dollars in the development of bridges, railroads, airports, and more.

From icons of infrastructure such as the Golden Gate Bridge to modern marvels such as the replacement Yankee Stadium, read on to discover some of America's most expensive public and private construction works of all time, ranked by total cost.

Project costs have been adjusted for inflation to give you an idea of how much they would cost in today's money.

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Nicole Robinson

10 February 2025

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