1 vote

CR507 Williams Bridge


Photo taken by Jack Schmidt


BH Photo #272538



Decorative quatrefoil


Through truss bridge over Gallatin River on CR 507
Gallatin County, Montana
Open to traffic
Built 1892; rehabilitated 1999
- A.Y. Bayne & Co. of Minneapolis, Minnesota
- Gillette-Herzog Manufacturing Co. of Minneapolis, Minnesota
Pratt through truss
Length of largest span: 107.9 ft.
Total length: 153.9 ft.
Deck width: 15.4 ft.
Vertical clearance above deck: 16.6 ft.
Eligible for the National Register of Historic Places
Also called
Gallatin River Bridge
Gallatin County Bridge 17
Approximate latitude, longitude
+45.54041, -111.23473   (decimal degrees)
45°32'25" N, 111°14'05" W   (degrees°minutes'seconds")
Approximate UTM coordinates
12/481674/5043012 (zone/easting/northing)
Quadrangle map:
Gallatin Gateway
Average daily traffic (as of 2004)
Inventory numbers
Gallatin County Bridge 17
BH 23039 (Bridgehunter.com ID)
Inspection report (as of June 2018)
Overall condition: Fair
Superstructure condition rating: Satisfactory (6 out of 9)
Substructure condition rating: Fair (5 out of 9)
Deck condition rating: Satisfactory (6 out of 9)
Sufficiency rating: 32.6 (out of 100)
View more at BridgeReports.com

Update Log 

  • September 22, 2016: New photos from David Jones
  • December 14, 2015: Updated by Luke: Re-dded county road to title to distinguish the two different Williams Bridges in the same county.
  • December 14, 2015: Updated by Andy Peters: clarifies name to "Williams Bridge"; adds Bozeman Daily Chronicle link
  • December 13, 2015: Updated by Luke: Added historical name


  • Jack Schmidt - jjturtle [at] earthlink [dot] net
  • Luke
  • Andy Peters - anpete1971 [at] gmail [dot] com
  • David Jones - david2jpix [at] yahoo [dot] com


Gallatin River Bridge
Posted December 13, 2015, by ArtS (asuckewer [at] knite [dot] com)
Gallatin River Bridge
Posted December 2, 2015, by Troy Carter (tcarter [at] dailychronicle [dot] com)

Known as No. 17 in its' county file. Locals call it the Williams Bridge despite there being another 'official' Williams Bridge in Gallatin County. MDT historian said Bridge No. 17 is probably oldest through-truss bridge still in use in Montana.

Gallatin River Bridge
Posted January 6, 2014, by Jack Schmidt (jjturtle [at] earthlink [dot] net)

Picture taken 7-7-13 My GPS N45 32.423 W111 14.072

This is a popular swimming hole on W Williams Rd

Webmaster's note: The photos that were here have been incorporated into the main site.