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Barnum Road Bridge


By the Middle Fork of the Powder River looking south-south-easterly at the Barnum Rd. (Johnson Co. Rd. 78) bridge. Kaycee, WY

Photo taken by Panoramio User elifino57

License: Creative Commons Attribution-NonCommercial-ShareAlike (CC BY-NC-SA)

View this photo at panoramio.com

BH Photo #266709

Street View 


Pony truss bridge over Middle Fork Powder River on Barnum Road (Route 190)
Johnson County, Wyoming
Open to traffic
Warren pony truss
Length of largest span: 60.0 ft.
Total length: 62.0 ft.
Deck width: 20.0 ft.
Approximate latitude, longitude
+43.65169, -106.84694   (decimal degrees)
43°39'06" N, 106°50'49" W   (degrees°minutes'seconds")
Approximate UTM coordinates
13/351058/4834845 (zone/easting/northing)
Quadrangle map:
Red Fork Powder River
Average daily traffic (as of 2016)
Inventory numbers
WY FNT (Wyoming bridge identifier)
BH 58031 (Bridgehunter.com ID)
Inspection report (as of May 2017)
Overall condition: Fair
Superstructure condition rating: Satisfactory (6 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Deck condition rating: Satisfactory (6 out of 9)
Sufficiency rating: 78.3 (out of 100)
View more at BridgeReports.com


Built 1990 (93)
Built during 1990s (780)
Functionally obsolete (5,825)
Have street view (28,910)
Johnson County, Wyoming (14)
Modern (2,673)
Open (40,969)
Owned by county (21,610)
Pony truss (17,012)
Span length 50-75 feet (10,420)
Total length 50-75 feet (9,574)
Truss (35,469)
Warren pony truss (3,558)
Warren truss (7,002)
Wyoming (403)

Update Log 

  • September 16, 2013: Added by Dave King


  • Dave King - DKinghawkfan [at] hotmail [dot] com


Barnum Road Bridge
Posted September 17, 2013, by Nathan Holth (form3 [at] historicbridges [dot] org)

This link shows the bridge photo Dave found in full size


I think I see floor beams under there, suggesting the truss still functions. However, the unusual appearance may be because the deck stringers rest on top of the floor beams. Sometimes deck stringers were originally riveted to the web of floor beams, which would lower the roadway, and make the truss look normal. Not sure if this bridge was originally like that, its all speculation with only one photo to go on.

Barnum Road Bridge
Posted September 16, 2013, by Don Morrison

Actually, it kind of looks like they slapped those trusses on the side of a stringer bridge. And the deck surface sits kind of high in the trusses. It looks rather strange.

I've got a guess what they did in 1989/1990, but no clue why.

Both bridges just look wrong in streetview.

Barnum Road Bridge
Posted September 16, 2013, by Nathan Holth (webmaster [at] historicbridges [dot] org)

NBI gives a 1990 date for this bridge. Obviously, this is a historic bridge, so perhaps the bridge was moved here in 1990?