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UP - Harrison-Monona Ditch Bridge


Street View 


Deck plate girder bridge over Harrison-Monona Ditch on UP Railroad
Harrison County, Iowa
Destroyed by flooding
- Union Pacific Railroad (UP)
Deck plate girder
Approximate latitude, longitude
+41.82539, -96.05923   (decimal degrees)
41°49'31" N, 96°03'33" W   (degrees°minutes'seconds")
Approximate UTM coordinates
14/744224/4634571 (zone/easting/northing)
Quadrangle map:
Little Sioux
Inventory number
BH 49681 (Bridgehunter.com ID)


Deck girder (5,674)
Destroyed by flood (457)
Girder (10,063)
Harrison County, Iowa (76)
Have street view (26,552)
Iowa (6,395)
Lost (24,196)
Owned by railroad (12,249)
Plate girder (7,789)
Railroad (15,305)
Union Pacific Railroad (2,352)

Update Log 

  • August 20, 2015: Updated by Luke: Updated status per forum comment
  • September 21, 2011: New photo from Luke Harden
  • September 20, 2011: Added by Jason Smith


  • Jason Smith - flensburg [dot] bridgehunter [dot] av [at] googlemail [dot] com
  • Luke


UP - Harrison-Monona Ditch Bridge : collapsed; hauled away
Posted August 20, 2015, by Bob K. (rck774200 [at] gmail [dot] com)

Iowa bridge collapse blamed on heavy rainfall rush

Published 12:17 PM CDT Aug 20, 2015


LITTLE SIOUX, Iowa —Crews are working to repair a Union Pacific Railroad bridge that collapsed near the town of Little Sioux, KETV-TV reports.

Union Pacific representative Mark Davis says the bridge collapsed sometime Wednesday afternoon. The bridge is located over the Monona Harrison ditch near Austin Avenue and 125th Street.

Officials believe a rise in water levels due to recent heavy rainfall caused the center pier of the bridge to collapse.

Water levels rose about nine feet in the area late Tuesday into early Wednesday morning, according to river gauges.

Crews arrived on scene Thursday morning to begin the repairs.

Davis says crews plan to lay down rocks alongside the bridge to support cranes.

They will assess the damage on the center pier that gave way to decide how to proceed with repairs.

No injuries were reported and no trains were in the area at the time of the collapse.

Union Pacific officials say the railroad runs from Council Bluffs to Sioux City and averages about eight trains a day.

Union Pacific officials say crews inspect bridges twice a year, and that this bridge passed the most recent test.