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Blackfoot River Bridge

Photos 

McNamara Bridge Over Blackfoot River

Northwest side of bridge

Photo taken by David Jones in September 2016

Enlarge

BH Photo #366085

Map 

Description 

It appears that two different styles of bridges make up one bridge here. Even the piers are different for the deck truss compared to the steel stringer.

Facts 

Overview
Deck truss bridge over Blackfoot River on MT 200
Location
Missoula County, Montana
Status
Open to traffic
History
Built 1940; rehabilitated 1988
Design
Deck truss
Dimensions
Length of largest span: 149.9 ft.
Total length: 445.9 ft.
Deck width: 46.3 ft.
Also called
McNamara Bridge
Approximate latitude, longitude
+46.91085, -113.67530   (decimal degrees)
46°54'39" N, 113°40'31" W   (degrees°minutes'seconds")
Approximate UTM coordinates
12/296275/5198731 (zone/easting/northing)
Quadrangle map:
Sunflower Mountain
Inventory number
BH 23107 (Bridgehunter.com ID)
Inspection (as of 05/2014)
Deck condition rating: Good (7 out of 9)
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Good (7 out of 9)
Sufficiency rating: 69.0 (out of 100)
Average daily traffic (as of 2009)
4,210

Categories 

Built 1940 (913)
Built during 1940s (3,568)
Deck truss (1,504)
Missoula County, Montana (46)
Montana (751)
Open (36,534)
Owned by state (13,650)
Skewed (4,672)
Span length 125-175 feet (3,767)
Total length 250-500 feet (4,599)
Truss (29,437)

Update Log 

  • March 25, 2012: Updated by Craig Philpott: Corrected location

Sources 

  • Craig Philpott - craigphilpott63 [at] gmail [dot] com
  • David Jones - david2jpix [at] yahoo [dot] com