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Blackfoot River Bridge

Photos 

Elevation View Of West Side Of Bridge Facing South

Photo taken by Historic American Engineering Record

View photos at Library of Congress

BH Photo #196412

Map 

Description 

Very little is known about the construction of the Blackfoot River Bridge. What is known about the bridge is that it originally was used as a railroad bridge. The bridge was likely transported by train to the place where it is located today spanning the Blackfoot River. The bridge was most likely constructed during the early 1900's because it is similar to other pony truss bridges common throughout rural Utah and parts of Idaho that were constructed during this time period. The bridge is currently used as a vehicular bridge, which provides access for recreation, farming and ranching, and some local residents.

- Historic American Engineering Record

Facts 

Overview
Lost Warren pony truss bridge over Blackfoot River on North Trail Road
Location
Caribou County, Idaho
Status
Replaced by new bridge
History
Built Ca. 1900, Replaced 2001
Design
Warren pony truss
Dimensions
Length of largest span: 60.0 ft.
Total length: 63.0 ft.
Deck width: 16.4 ft.
Approximate latitude, longitude
+42.76733, -111.44697   (decimal degrees)
42°46'02" N, 111°26'49" W   (degrees°minutes'seconds")
Approximate UTM coordinates
12/463431/4735074 (zone/easting/northing)
Quadrangle map:
Lower Valley
Inventory numbers
ID 23300 (Idaho bridge number)
BH 48524 (Bridgehunter.com ID)
Inspection (as of 04/1991)
Deck condition rating: Fair (5 out of 9)
Superstructure condition rating: Poor (4 out of 9)
Substructure condition rating: Poor (4 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 33.4 (out of 100)
Average daily traffic (as of 1989)
30

Update Log 

  • January 14, 2015: Updated by Dave King: Added HAER description
  • March 29, 2011: Added by Michael Goff

Sources 

  • Mike Goff - michael [dot] goff [at] hotmail [dot] com
  • HAER ID-38 - Blackfoot River Crossing Bridge, North Trail Canyon Road, approximately 12 miles northeast of Soda Springs, Soda Springs vicinity, Caribou County, ID
  • Dave King - DKinghawkfan [at] hotmail [dot] com