Rating:
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IAIS - Big Bear Creek Bridge

Iowa County, Iowa

Photos 

Photo taken by Doug Lambert

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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)

Categories 

American Bridge Co. (1,250)
Beam (12,749)
Big Bear Creek (Iowa River Tributary) (6)
Built 1901 (481)
Built during 1900s (6,433)
Chicago, Rock Island & Pacific Railroad (939)
Concrete stringer (643)
Doomed (1,049)
Girder (8,492)
Have street view (23,518)
Iowa (5,939)
Iowa County, Iowa (84)
Iowa Interstate Railroad (154)
 Lattice through truss (472)
Lattice truss (503)
Open (36,948)
Owned by railroad (10,318)
Plate girder (6,517)
Quadrangular lattice through truss (162)
Railroad (13,686)
Span length 100-125 feet (4,084)
Through girder (3,142)
Through truss (13,143)
Total length 250-500 feet (4,702)
Truss (29,807)

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
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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.