5 votes

CSX - Long Bridge


Long Bridge Swing Span

Since the I-395 bridge was built just upstream, the swing section has not functioned. The guard piers that protect the swing span when open have apparently been removed.

Photo taken by Robert Thompson in February 2011


BH Photo #194032


Street Views 


Boat Passing Under Bridge(s)

Dave Goldsmith via Facebook, used with permission

Play video


Built 1902-04 with truss spans adapted for reuse from previous bridge (possibly at Trenton, NJ), except for new swing span. Rebuilt substantially 1942-43 with additional piers added and two steel plate girder spans replacing each iron truss span, except for swing span.


Through truss and girder bridge over Potomac River on CSX Railroad
Washington, District of Columbia, and Arlington County, Virginia
Open to traffic
Future prospects
Project for replacement underway: see http://longbridgeproject.com
Built 1904; majorly rebuilt 1942-43 with girder spans replacing truss spans except for swing span
- CSX Railroad (CSX)
- Commuter Rail
- Virginia Railway Express (VRE)
Non-functioning swing span in navigation channel of the river. Swing span last opened November 7, 1967 and March 3, 1969.
Also called
CSX - Longbridge Swing Bridge
Approximate latitude, longitude
+38.87407, -77.03876   (decimal degrees)
38°52'27" N, 77°02'20" W   (degrees°minutes'seconds")
Approximate UTM coordinates
18/323139/4304777 (zone/easting/northing)
Quadrangle map:
20 ft. above sea level
Inventory number
BH 48195 (Bridgehunter.com ID)

Update Log 

  • March 3, 2019: New photo from Andy Peters
  • November 8, 2018: Updated by Alexander D. Mitchell IV: Long-term replacement project in process
  • October 7, 2018: Photo imported by Alexander D. Mitchell IV
  • October 4, 2018: New video from Alexander D. Mitchell IV
  • February 25, 2018: Updated by Amanda: Nobody calls it the CSX Potomac River Bridge... I’ve always heard either “Long Bridge” or “Longbridge Swing Bridge”
  • January 21, 2018: Photo imported by Alexander D. Mitchell IV
  • February 6, 2017: Updated by Alexander D. Mitchell IV: Additional history added
  • September 16, 2016: Updated by Christopher Finigan: Added categories "Pin-connected", "Riveted"
  • September 16, 2016: New Street View added by Dana and Kay Klein
  • August 22, 2013: New photo from Douglas Butler
  • November 16, 2012: New Street View added by Jared Mixson
  • February 20, 2011: Added by Robert Thompson

Related Bridges 



CSX - Long Bridge
Posted December 9, 2020, by Amanda Murphy (nittanypanda [at] yahoo [dot] com)

The Bridge is NOT being replaced as part of the new expansion project. The Long Bridge will remain and continue to accommodate rail traffic. A new 2 track railroad bridge will be built upstream to increase capacity between NE and SE corridors. See: http://longbridgeproject.com/feisrod/

CSX - Long Bridge
Posted July 26, 2019, by Zachary S

This is along the main Amtrak corridor entering DC and when I take the Crescent it's always a major highlight. Here's hoping preservation ensues but it certainly wouldn't be the first great truss I like to be scrapped recently...

CSX Potomac River Swing Bridge
Posted April 27, 2014, by Anonymous

Flew into nextdoor Reagan International yesterday. Nice bridge, didn't get a photo though.