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Double S Cutoff Bridge


Photo taken by John A. Jackson


BH Photo #353649



Pony truss bridge over Mcdonald Creek on Double S Cutoff
Petroleum County, Montana
Open to traffic
Built 2012
Warren pony truss with all verticals
Length of largest span: 69.6 ft.
Total length: 70.9 ft.
Deck width: 18.0 ft.
Approximate latitude, longitude
+47.03095, -108.59348   (decimal degrees)
47°01'51" N, 108°35'37" W   (degrees°minutes'seconds")
Approximate UTM coordinates
12/682847/5211414 (zone/easting/northing)
Quadrangle map:
Average daily traffic (as of 2013)
Inventory number
BH 72209 (Bridgehunter.com ID)
Inspection report (as of January 2016)
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: 45.9 (out of 100)
View more at BridgeReports.com

Update Log 

  • May 18, 2016: New photos from Luke
  • May 17, 2016: Added by J.P.


  • J.P. - wildcatjon2000 [at] gmail [dot] com
  • Luke


Double S Cutoff Bridge
Posted May 18, 2016, by John A. Jackson (jojackson [at] mt [dot] gov)

Spring flooding in 2011 washed out a double culvert at this crossing on McDonald Creek. The road was realigned and the truss installed. The truss had been salvaged from somewhere in Richland County, Montana and had been sitting in the field near the crossing awaiting installation.

Double S Cutoff Bridge
Posted May 17, 2016, by Nathan Holth (webmaster [at] historicbridges [dot] org)

Looking at Google Earth historical imagery, it looks to me like the bridge and approaching roadway were washed away in a flood, see this photo from November 2011, and to me it would appear that the truss was salvaged and reinstalled on a new alignment... the new alignment being set at a location where there was no flood damage... because it looks like the flood changed the course of the river to some extent or washed away the bank completely where the old road was.

Double S Cutoff Bridge
Posted May 17, 2016, by J.P. (wildcatjon2000 [at] gmail [dot] com)

Bridge says it was built in 2012 via the NBI, Bing shows the bring sitting a field, Google shows it over the creek with a possible replacement being built or is the truss replacing the other bridge.