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Selden Island Bridge


Bridge to Selden Island


View this photo at panoramio.com

BH Photo #331524


Street View 


The only access to Selden Island, this bridge and island were purchased by the Howard Hughes Medical Institute for use by the Janelia Farm Research Campus. Little is known about this bridge. Any and all information from locals would be extremely helpful.


Bailey pony truss bridge over Potomac River on private road
Montgomery County, Maryland, and Loudoun County, Virginia
Intact but closed to all but private traffic
Bailey pony truss
Approximate latitude, longitude
+39.07351, -77.45695   (decimal degrees)
39°04'25" N, 77°27'25" W   (degrees°minutes'seconds")
Approximate UTM coordinates
18/287454/4327807 (zone/easting/northing)
Quadrangle map:
Inventory numer
BH 68396 (Bridgehunter.com ID)

Update Log 

  • July 9, 2015: New Street View added by Luke
  • July 9, 2015: Added by Elliott Johnson


  • Elliott Johnson - elliottsgon15 [at] hotmail [dot] com
  • Luke


Selden Island Bridge
Posted July 9, 2015, by Luke

You can see a different, shorter pier adjacent to the piers for the Bailey truss in the streetview.

Perhaps those were for the bridge the archaeologist crossed?

Selden Island Bridge
Posted July 9, 2015, by Elliott Johnson (elliottsgon15 [at] hotmail [dot] com)

the archeologist crossed "a" bridge to this island in 1938 but I might have assumed incorrectly assumed that it was the same bridge. It probably replaced that bridge but I wish I knew when. I saw the patent date of the design after I had already submitted the entry.

Selden Island Bridge
Posted July 9, 2015, by Anonymous

I doubt this was around in 1938, as the Bailey truss was in development in the UK at the time.