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Sandy Hook Bridge


Traveling south

Photo taken by Jodi Christman in May 16, 2014


BH Photo #283802


Street View 


FROM WIKI This bridge was constructed at Sandy Hook between 1940 and 1947, with a long interruption due to World War II.

US 340 enters Maryland at the Potomac Water Gap just south of the confluence of the Potomac River and the Shenandoah River at Harpers Ferry. The Potomac Water Gap is where the Potomac River passes between two sets of ridges. The first set of ridges is Elk Ridge to the north, also known as Maryland Heights, and Blue Ridge Mountain, which forms the border between West Virginia and Virginia, to the south. The second set of ridges is South Mountain in Maryland and Short Hill Mountain in Virginia. US 340 passes along the northern edge of Blue Ridge Mountain then passes through the northwestern corner of Loudoun County, Virginia before crossing the Potomac River at an angle, running southwest–northeast on a two-lane steel continuous deck truss bridge at the community of Sandy Hook. On the Maryland side, the bridge also crosses the Chesapeake and Ohio Canal, CSX's Cumberland Subdivision, and Sandy Hook Road, the original alignment of US 340.


Deck truss bridge over Potomac River on US 340
Loudoun County, Virginia, and Washington County, Maryland
Open to traffic
Built 1947; rehabilitated 1978
Deck truss
Length of largest span: 190.0 ft.
Total length: 2,246.2 ft. (0.4 mi.)
Deck width: 25.3 ft.
Also called
Potomac River Bridge
US 340 Bridge
Approximate latitude, longitude
+39.32333, -77.70833   (decimal degrees)
39°19'24" N, 77°42'30" W   (degrees°minutes'seconds")
Approximate UTM coordinates
18/266534/4356156 (zone/easting/northing)
Quadrangle map:
Harpers Ferry
Average daily traffic (as of 2008)
Inventory numbers
VA 11145 (Virginia bridge number)
BH 33744 (Bridgehunter.com ID)
Inspection report (as of January 1999)
Overall condition: Fair
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Deck condition rating: Good (7 out of 9)
Sufficiency rating: 36.2 (out of 100)
View more at BridgeReports.com

Update Log 

  • July 9, 2014: New photo from Andrew Raker
  • May 19, 2014: Updated by Jodi Christman: Added description
  • May 4, 2010: New Street View added by Nathan Holth