List of most expensive U.S. public works projects

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Below is a list of so-called megaprojects that are among the most expensive in U.S. history.

Highways

The following list includes projects to build new highways or improve existing ones, including roadways, bridges, and tunnels. It includes only projects that are underway or completed. Additionally, projects with multiple independent segments (e.g., I-69 Indiana-Texas Extension, Trans-Texas Corridor) are not included, though individual segments may or may not make the list. Costs shown below exclude financing costs.

Date Price (nominal) Reference Year Price (ref. year) Price (2025$) Project
1992-2006 $14.6 billion[1][2] 1982 $8.08 billion data-sort-value=Error when using {{Inflation}}: |end_year=2025 (parameter 4) is greater than the latest available year (2021) in index "US". | $NaN Big Dig, Boston, Massachusetts
2002-13 $6.416 billion (est.)[3] data-sort-value=Error when using {{Inflation}}: |end_year=2025 (parameter 4) is greater than the latest available year (2021) in index "US". | San Francisco–Oakland Bay Bridge East Span Replacement, San Francisco/Oakland, California
1988-2002 $5.0 billion [4] data-sort-value=Error when using {{Inflation}}: |end_year=2025 (parameter 4) is greater than the latest available year (2021) in index "US". | Mon-Fayette Expressway, southwest Pennsylvania and northern West Virginia
2005–20 (est.) $4.1 billion (est.)[5] Ohio River Bridges Project, Louisville, Kentucky, and southern Indiana
2001-7 $3.6 billion[6] data-sort-value=Error when using {{Inflation}}: |end_year=2025 (parameter 4) is greater than the latest available year (2021) in index "US". | Central Texas Turnpike, area around Austin, Texas
2007-11 $2.57 billion[7] data-sort-value=Error when using {{Inflation}}: |end_year=2025 (parameter 4) is greater than the latest available year (2021) in index "US". | Intercounty Connector, Montgomery County, Maryland
1999–2008 $2.5 billion[8] data-sort-value=Error when using {{Inflation}}: |end_year=2025 (parameter 4) is greater than the latest available year (2021) in index "US". | Woodrow Wilson Bridge Replacement, Washington, D.C., Northern Virginia, and southern Maryland
2015-21 $2.3 billion[9] (est.) I-4 Ultimate corridor reconstruction, Orlando, Florida
2012–15 $4.25 billion data-sort-value=Error when using {{Inflation}}: |end_year=2025 (parameter 4) is greater than the latest available year (2021) in index "US". | Alaskan Way Viaduct replacement tunnel, Seattle, Washington
2008–18 $1.8 billion[10] (est.) Interstate 69 Extension SIU #3, Evansville to Indianapolis, Indiana
2013-21 $1.6 billion[11] (est.) Wekiva Parkway, Orlando, Florida
2001–16 $1.4 billion[12] (est.) I-95 New Haven Harbor Corridor Reconstruction, New Haven, Connecticut
1991–2003 $1.2 billion[13] data-sort-value=Error when using {{Inflation}}: |end_year=2025 (parameter 4) is greater than the latest available year (2021) in index "US". | E-470, Denver, Colorado
1933-7 $37 million 1937 $37 million data-sort-value=Error when using {{Inflation}}: |end_year=2025 (parameter 4) is greater than the latest available year (2021) in index "US". | $NaN Golden Gate Bridge
2015-28 $67.6 billion (est.) 2013 $54.9 billion data-sort-value=Error when using {{Inflation}}: |end_year=2025 (parameter 4) is greater than the latest available year (2021) in index "US". | $NaN (est.) California High-Speed Rail, Phase 1, California
1863-9 $124,548,691[14] 1873 $124,548,691 data-sort-value=Error when using {{Inflation}}: |end_year=2025 (parameter 4) is greater than the latest available year (2021) in index "US". | $NaN First Transcontinental Railroad
1956-2025 $425 billion 2006 $425 billion data-sort-value=Error when using {{Inflation}}: |end_year=2025 (parameter 4) is greater than the latest available year (2021) in index "US". | $NaN Interstate Highway System
2003-2008 $1.5 billion 2001 $2.8 billion (2008)[15][16] $3.1 billion I-10 Katy Freeway Expansion (Interstate 10 in Texas)

See also

References

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  1. ↑ Central Artery/Tunnel Project Website
  2. ↑ Boston’s ‘Big Dig’ opens to public, MSNBC, December 20, 2003
  3. ↑ http://baybridgeinfo.org/faq
  4. ↑ Turnpike panel says high costs imperil Mon-Fayette, Southern Beltway projects, Pittsburgh Post-Gazette, April 27, 2007
  5. ↑ Louisville Bridges Cost Now $4.1 Billion, The Urbanophile, October 6, 2007
  6. ↑ Federal Highway Administration, Central Texas Turnpike Fact Sheet
  7. ↑ Maryland Department of Transportation ICC Website
  8. ↑ Woodrow Wilson Bridge Replacement Website
  9. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  10. ↑ I-69 Indianapolis to Evansville Corridor Study
  11. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  12. ↑ COG panel OK with $498M spike in Q bridge cost, New Haven Register, August 9, 2007
  13. ↑ Final leg of E-470 nears completion, Denver Business Journal, December 13, 2002
  14. ↑ http://cprr.org/Museum/FAQs.html#Cost
  15. ↑ http://offthekuff.com/wp/?p=55761
  16. ↑ http://www.fhwa.dot.gov/ipd/project_profiles/tx_katyfreeway.aspx
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