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UP - Palouse River Bridge Br279.10

Photos 

View from south end of bridge looking north.

Photo taken by Kyle Jarvis in July 2008

Enlarge

BH Photo #338883

Map 

Description 

Deck Pratt truss with unusual design involving one end being supported on the bottom chord and the other end being supported on the top chord. Quoting the Railway Age Gazette from May 31, 1912: "The truss span will rest on a pier at the south end, and will be hung from a pin connection in the upper chord at the north end. The erection of this structure will present some interesting problems, for it is desired to erect it as a cantilever from the north end. To do this it will be necessary to construct temporary horizontal and vertical struts under the first panel point of the lower chord and tie the upper chord pins to a very heavy anchorage some distance back from the face of the canyon."

Facts 

Overview
Pratt deck truss bridge over Palouse River on Union Pacific RR Ayer Subdivision
Location
Whitman County, Washington, and Franklin County, Washington
Status
Open to traffic
History
Built 1912
Railroad
- Union Pacific Railroad (UP)
Design
Pratt deck truss
Dimensions
Length of largest span: 150.0 ft.
Total length: 235.0 ft.
Also called
UP Br279.10
Approximate latitude, longitude
+46.69114, -118.22424   (decimal degrees)
46°41'28" N, 118°13'27" W   (degrees°minutes'seconds")
Approximate UTM coordinates
11/406391/5171570 (zone/easting/northing)
Quadrangle map:
Palouse Falls
Inventory number
BH 69531 (Bridgehunter.com ID)

Update Log 

  • October 7, 2015: Added by Kyle Jarvis

Sources