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Portland Bridge (1927)



Photos taken June 2007 by James Baughn

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BH Photo #109174

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CDOT plans to replace this bridge starting next month as a part of their FASTER Bridge Enterprise program. Cost for the work is around $5.4 million and will take about a year.


Deck truss over the Arkansas River on SH 120 at Portland
Portland, Fremont County, Colorado
replaced by new bridge
Built 1927, replaced 2014
Riveted, 8-panel Pratt deck truss (reinforced with Bailey trusses)
Length of largest span: 150.0 ft.
Total length: 388.0 ft.
Deck width: 20.0 ft.
Posted to the National Register of Historic Places on February 4, 1985
Approximate latitude, longitude
+38.38840, -105.01580   (decimal degrees)
38°23'18" N, 105°00'57" W   (degrees°minutes'seconds")
Approximate UTM coordinates
13/498620/4248910 (zone/easting/northing)
Quadrangle map:
Average daily traffic (as of 2008)
Inventory numbers
CDOT K-16-K (Colorado Dept. of Transportation structure number)
NRHP 85000210 (National Register of Historic Places reference number)
BH 11882 (Bridgehunter.com ID)
Inspection report (as of August 2012)
Overall condition: Fair
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Fair (5 out of 9)
Deck condition rating: Satisfactory (6 out of 9)
Sufficiency rating: 13.5 (out of 100)
View more at BridgeReports.com

Update Log 

  • September 1, 2015: Updated by Elliott Johnson: bridge has been replaced
  • October 12, 2011: Updated by K. A. Erickson: Bridge is doomed
  • October 31, 2009: New photos from Joshua Collins
  • September 27, 2007: Posted new photos

Related Bridges 


  • Joshua Collins - Bigjc1979 [at] aol [dot] com
  • K. A. Erickson
  • Elliott Johnson - elliottsgon15 [at] hotmail [dot] com
  • Bridge Replacement Summary - CODoT - Construction completed on new bridge


Portland Bridge
Posted November 1, 2009, by Nathan Holth (form3 [at] historicbridges [dot] org)

Those are Bailey trusses which have been added to bypass the load-supporting function of the original trusses. Bailey trusses often to have a slight sag in the deck, this is usually normal. The Baileys were likely added because they found the bridge deteriorating. The Bailey trusses may be the result of a cheap preservation solution or a last ditch effort to keep the bridge in service while demo plans are sought.