Rating:
3 votes

MILW - Pile-Pontoon Bridge (1913)

Clayton County, Iowa, and Crawford County, Wisconsin

Photos 

Photo provided by Hank Zaletel

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View this photo on Flickr

BH Photo #249609

Map 

Facts 

Overview
Lost Pontoon bridge over Mississippi River on Chicago, Milwaukee, St. Paul & Pacific Railroad
Location
Prairie Du Chien, Clayton County, Iowa, and Crawford County, Wisconsin
Status
Removed
History
Built 1913; Disassembled 1961
Railroad
- Chicago, Milwaukee, St. Paul & Pacific Railroad (MILW)
Design
47 Span Pile Trestle
2-105' Warren Pony Truss
1-49' Deck Girder
1-270' Pontoon Span
1-49' Deck Girder
2 Span Pile Trestle
1-55' Twin Deck Girder
12 Span Pile Trestle
Dimensions
Length of largest span: 270.0 ft.
Also called
MILW Bridge #B-380
Approximate latitude, longitude
+43.04402, -91.17512   (decimal degrees)
43°02'38" N, 91°10'30" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/648638/4767319 (zone/easting/northing)
Quadrangle map:
Prairie du Chien
Inventory number
BH 51377 (Bridgehunter.com ID)

Categories 

Built 1913 (912)
Built during 1910s (10,024)
Chicago, Milwaukee, St. Paul & Pacific Railroad (1,111)
Clayton County, Iowa (123)
Crawford County, Wisconsin (29)
Floating (43)
Girder (11,233)
Iowa (6,812)
Lost (29,179)
Lost 1961 (111)
Lost during 1960s (1,001)
Marquette, Iowa (7)
Mississippi River (232)
Movable (3,136)
Owned by railroad (13,587)
 Plate girder (8,780)
Pontoon (44)
Pony truss (17,093)
Prairie Du Chien, Wisconsin (3)
Railroad (16,544)
Span length 250-500 feet (1,263)
State line crossing (922)
Swing (1,576)
Through girder (4,214)
Truss (36,036)
Uncovered wooden truss (155)
Warren pony truss (3,583)
Warren truss (7,052)
Wisconsin (1,713)

Update Log 

  • June 25, 2022: New photo from Jim Kuhn
  • October 5, 2021: Updated by John Marvig: added design information from 1951
  • September 1, 2021: New photo from Luke
  • April 13, 2021: New photo from Geoff Hubbs
  • November 5, 2019: New photo from David Shedlock
  • April 7, 2016: Updated by Luke: Corrected build date + added west channel structure dimensions from section of the 1913 blueprint
  • March 1, 2015: New photo from Luke
  • March 2, 2013: New photos from Luke Harden
  • February 21, 2012: Updated by Luke Harden: Added category "Mississippi River"

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Sources 

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