3 votes

Great Crossings Bridge (Old US 40/National Road)


Bridgemapper.com photo

Photo taken by Todd Wilson in 1999

BH Photo #405581

Street View 


Abandoned town under water emerges! Somerfield Pa

Video of inundated town that includes footage of the bridge and old photos of the bridge.

Stuffthats Gone

Play video on YouTube

Play video on YouTube


This bridge's status says "Open to Pedestrians" due to the fact that it has never been closed to anyone, and since it is in perfect shape, curious pedestrians walk across it when the lake level is down.


Stone arch bridge over Youghiogheny River Lake (or, to state it more accurately, the Youghiogheny River Lake crosses the Great Crossings Bridge) on an old alignment of US 40/National Road
Somerset County, Pennsylvania, and Fayette County, Pennsylvania
Open to pedestrians
Future prospects
The bridge is "Preserved in place" by default.
Built 1818 as part of the National Road. Bridge submerged along with Somerfield when Youghiogheny River was dammed downstream to create Youghiogheny River Lake.
Stone arch
Approximate latitude, longitude
+39.75465, -79.39553   (decimal degrees)
39°45'17" N, 79°23'44" W   (degrees°minutes'seconds")
Approximate UTM coordinates
17/637449/4401757 (zone/easting/northing)
Quadrangle map:
Inventory number
BH 50552 (Bridgehunter.com ID)

Update Log 

  • May 15, 2020: New photos from Geoff Hubbs
  • October 6, 2019: New photo from Melissa Brand-Welch
  • October 28, 2016: New video from Kelly McClanahan
  • February 12, 2016: Updated by Don Morrison: Moved pin to approximate location
  • December 15, 2011: Updated by James McCray: Added categories "US 40", "National Road"
  • August 21, 2008: Updated by Kim Harvey
  • August 20, 2008: Added by Kim Harvey



Somerfield Bridge
Posted February 12, 2016, by Don Morrison
Somerfield Bridge
Posted February 12, 2016, by Don Morrison

Curses! Foiled again!

Found some info about this interesting bridge and added to the page only to find out that it is a duplicate. 8^(

info needs to be edited/merged and the duplicate removed.

Great Crossings Bridge (Old US 40/National Road)
Posted December 15, 2011, by Tony Dillon (spansaver [at] hotmail [dot] com)

I have to agree with Nathan...and would classify this one as an "Interesting Ruin".

Great Crossings Bridge (Old US 40/National Road)
Posted December 15, 2011, by Nathan Holth (form3 [at] historicbridges [dot] org)

PennDOT already found the US-40 truss bridge seen in the background of the Panoramio photos from 2000. The bridge there today is a PennDOT special. (Ugly modern bridge with stone formliner on all concrete elements)

As for the stone bridge, I would argue that the bridge falls a bit short of preserved and perfect shape. In the photos from 2000, I see evidence of severe deterioration. Entire portions of the parapet are missing, and on some portions of the bridge the belt course and even parts of the spandrel wall are missing as well. The loss of the stones in the spandrel wall appear to have exposed the earth fill to the water in which the bridge is submerged, which have caused it to slowly wash the fill out of the bridge. This can be seen in a 2010 photo of the bridge where portions of the added concrete deck have broken and settled, since the fill that once supported them is gone.

Great Crossings Bridge (Old US 40/National Road)
Posted December 15, 2011, by James McCray (jamesinslocomb [at] yahoo [dot] com)

Check this one out! Who needs Atlantis? We have the entire city of Somerfield, PA and its bridge submerged and preserved perfectly underneath the Youghiogheny River Lake. However the bridge appears above water from time to time. Well, at least this bridge is safe from the clutches of PennDOT, then again, maybe not; for this one they may hire rogue ex-NAVY Seals and have them plant underwater explosives on the bridge to destroy it.

Somerfield Bridge
Posted December 1, 2009, by Terry Divelbliss (vette442 [at] hotmail [dot] com)

I took these photos from the east during a low water period in the dam on December 5, 2008. The second photo shows the Somerfield bridge's proximity to Route 40 (and the newly built bridge over the Yough reservoir). You can see the bases of the piers of the previous Route 40 bridge that was demolished earlier that year.