Rating:
7 votes

IAIS - Big Bear Creek Bridge

Photos 

Photo taken by Doug Lambert

Enlarge

View this photo on Flickr

BH Photo #249769

Map 

Street View 

Facts 

Overview
Quadrangular Through Truss over Big Bear Creek on Iowa Interstate Railroad
Location
Iowa County, Iowa
Status
Open to traffic
Future prospects
http://www.iowadot.gov/iowainmotion/railplan/2017/IowaSRP201... (Page 111)
History
Built 1901
Builder
- American Bridge Co. of New York
Railroads
- Chicago, Rock Island & Pacific Railroad (RI; CRIP; ROCK)
- Iowa Interstate Railroad (IAIS)
Design
Quadrangular lattice through truss with through plate girder and modern concrete beam
Dimensions
Length of largest span: 110.0 ft.
Total length: 310.0 ft.
Approximate latitude, longitude
+41.78600, -92.09167   (decimal degrees)
41°47'10" N, 92°05'30" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/575477/4626415 (zone/easting/northing)
Quadrangle map:
Marengo
Inventory number
BH 51074 (Bridgehunter.com ID)

Update Log 

  • May 20, 2017: New photos from John Marvig
  • April 24, 2017: Updated by Luke: Doomed
  • August 15, 2013: New photos from John Marvig
  • August 13, 2013: Updated by John Marvig: Added dimensions
  • May 19, 2013: New Street View added by Luke Harden
  • May 19, 2013: Updated by John Marvig: Added Build Date
  • March 5, 2013: New photo from Luke Harden
  • March 4, 2013: New photo from Luke Harden
  • February 20, 2013: New photo from Luke Harden
  • June 27, 2012: Updated by Luke Harden: Consensus is it's a quadrangular truss , so I listed it as a quad-lattice truss
  • June 27, 2012: Updated by Fmiser: changed type
  • January 25, 2012: Updated by Luke Harden: Added category "Big Bear Creek"
  • January 24, 2012: Updated by Luke Harden: Added category "Iowa Interstate Railroad"

Sources 

  • Luke
  • Flickr - Image
  • Fmiser - fmiser [at] gmail [dot] com
  • John Marvig - marvigj27 [at] gmail [dot] com

Comments 

IAIS Big Bear Creek Bridge
Posted June 27, 2012, by Fmiser (fmiser [at] gmail [dot] com)

A whipple would have verticals. This one does not. It matches what I understand to be a warren quadrangular or lattice truss.

IAIS Big Bear Creek Bridge
Posted June 27, 2012, by John Marvig (johnmarvig [at] chaska [dot] net)

It looks like a short variation of the Quadrangular truss. I don't think it is whipple though. But I could be wrong. Compare it to this bridge.

http://bridgehunter.com/photos/22/79/227972-L.jpg

IAIS Big Bear Creek Bridge
Posted June 27, 2012, by Robert Elder (robertelder1 [at] gmail [dot] com)

Looks like a quadruple intersectional Lattice truss to me.

IAIS Big Bear Creek Bridge
Posted June 27, 2012, by Luke Harden (lmharden [at] iastate [dot] edu)

So what kind of truss is this? Looks like a Whipple.