Rating:
1 vote

Silver Bridge

Photos 

Silver Bridge

view from the south

Photo taken by David Jones in October 2017

Enlarge

BH Photo #405794

Map 

Street Views 

Description 

This bridge was rehabilitated/restored again in 2015. Enclosed are a few photos taken during June of 2015 while the rehabilitation/restoration was in progress.

Facts 

Overview
Through truss bridge over Big Hole River on CR 017
Location
Silver Bow County, Montana, and Beaverhead County, Montana
Status
Open to traffic
History
Built 1914; rehabilitated 1947
Design
Polygonal Warren through truss
Dimensions
Length of largest span: 154.2 ft.
Total length: 230.0 ft.
Deck width: 15.7 ft.
Vertical clearance above deck: 12.2 ft.
Also called
Big Hole River Bridge
Divide Bridge
Pumphouse Road Bridge
Approximate latitude, longitude
+45.75968, -112.80155   (decimal degrees)
45°45'35" N, 112°48'06" W   (degrees°minutes'seconds")
Approximate UTM coordinates
12/359899/5068925 (zone/easting/northing)
Quadrangle map:
Dewey
Inventory number
BH 23174 (Bridgehunter.com ID)
Inspection (as of 04/2014)
Deck condition rating: Serious (3 out of 9)
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Fair (5 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 15.3 (out of 100)
Average daily traffic (as of 2003)
100

Update Log 

  • October 13, 2017: New photos from David Jones
  • March 27, 2012: New Street View added by Craig Philpott
  • April 20, 2010: Updated by Nathan Holth: Added GPS and info.

Sources 

Comments 

Silver Bridge
Posted December 1, 2016, by Nathan Holth (webmaster [at] historicbridges [dot] org)

Jason... first off rehabilitation isn't a "bad word" its still preservation... but just a very different form of preservation than restoration, so I strongly believe using the right word is critical. People need to understand what the benefit is to "restoration", and what's unique about restoration-focused solutions such as those offered by Workin' Bridges and Bach Steel. They need to understand they are getting a more true-to-form end-product.

As for this bridge, I am not sure of the exact scope of work but I think its a safe bet we aren't looking at restoration of the through truss span, more of a rehabilitation. Use of bolts instead of rivets, etc. What I am 100% certain of however is we have demolition and replacement of the historic riveted pony truss span and replacement with modern pre-fab welded truss. Google Streetview clearly illustrates the original pony truss span.

As for the bedrock, I have no idea where you read that their was a connection between bedrock and the need to replace the pony truss span. I see no mention of that connection in the article. Bedrock and soils are things that typically affect substructure work not superstructure work.

Silver Bridge
Posted December 1, 2016, by Jason Smith (flensburg [dot] bridgehunter [dot] av [at] googlemail [dot] com)

Actually Nathan, the bridge has been restored. They just replaced the decking and did the repainting, while at the same time, placed the crossing onto newly rebuilt piers. What's different with the bridge is a pony truss approach span, which was needed because of the bed rock they encountered while trying to put the bridge back in its place. In either case, I see this as restoration with a twist. ;-) Link: http://mtstandard.com/news/local/silver-bridge-to-span-big-h...

Big Hole River Bridge
Posted June 4, 2015, by Nathan Holth (nathan [at] historicbridges [dot] org)

Nope, sorry, the engineer is Nathan Haddick not Nathan Holth. And the Contractor isn't Bach Steel... so I am thinking REHAB is a better word than RESTORE.

Big Hole River Bridge
Posted June 4, 2015, by ArtS (asuckewer [at] knite [dot] com)