1 vote

UP - Lake Amistad Bridge


Beyond the west approach

Photo taken by Nathan Morton in March 2013


BH Photo #252753

Street View 


Polygonal Warren through truss bridge over Lake Amistad (reservoir)
Del Rio, Val Verde County, Texas
Open to traffic
Built 1963 on new alignment for Amistad Reservoir Project
- Southern Pacific Railroad (SP)
- Union Pacific Railroad (UP)
Polygonal Warren through truss with all verticals
Length of largest span: 403.0 ft.
Total length: 2,243.0 ft. (0.4 mi.)
Deck width: 24.0 ft.
Also called
SP - Lake Amistad Bridge
Approximate latitude, longitude
+29.48574, -101.03543   (decimal degrees)
29°29'09" N, 101°02'08" W   (degrees°minutes'seconds")
Approximate UTM coordinates
14/302661/3263529 (zone/easting/northing)
Quadrangle map:
Amistad Dam
Inventory number
BH 39074 (Bridgehunter.com ID)

Update Log 

  • January 1, 2022: New photo from Geoff Hubbs
  • April 19, 2021: New photo from Geoff Hubbs
  • September 25, 2014: New photo from Royce and Bobette Haley
  • September 24, 2014: New photos from Royce and Bobette Haley
  • September 23, 2014: New Street View added by Ralph Demars
  • September 23, 2014: Updated by Royce and Bobette Haley: added build date
  • April 22, 2013: New photos from Nathan Morton
  • February 26, 2011: Updated by Craig Philpott: corrected location


  • Craig Philpott - craigphilpott63 [at] gmail [dot] com
  • Nathan Morton - morton890 [at] yahoo [dot] com
  • Royce and Bobette Haley - roycehaley111 [at] yahoo [dot] com
  • Geoff Hubbs


UP - Lake Amistad Bridge
Posted March 12, 2021, by Paul

This is a Warren truss because the diagonal members form a repeating "W" shape. Technically, it could be called a polygonal Warren because the top chord has multiple slopes instead of being parallel to the lower chord. A Parker truss also has the polygonal top chord, but its diagonals would be sloping downward from the top chord toward the center of the span rather than in a continuous W shape.

UP - Lake Amistad Bridge
Posted February 26, 2021, by A.C. (amandasoliscurtis [at] gmail [dot] com)

Is this bridge a Warren through truss as stated above? I have no bridge identification experience but to me it looks more like a Parker truss type. Can the reason why this is a Warren truss be explained to me. Thank you!