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MILW - Pile-Pontoon Bridge

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
Marquette, Clayton County, Iowa, and Crawford County, Wisconsin
Status
Removed
History
Built 1913; Disassembled 1961
Railroad
- Chicago, Milwaukee, St. Paul & Pacific Railroad (MILW; CMStP&P; CMStP)
Design
(West channel)
276.4' Uncovered wooden howe pony truss pontoon
29' Hinged Pony plate girder
2 105' Warren pony trusses
1 55' deck plate girder
Timber stringer
(East Channel)
1 Pratt through truss
1 Pontoon
Timber stringer
Dimensions
Length of largest span: 276.4 ft.
Approximate latitude, longitude
+43.04503, -91.18005   (decimal degrees)
43°02'42" N, 91°10'48" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/648234/4767422 (zone/easting/northing)
Quadrangle map:
Prairie du Chien
Inventory number
BH 51377 (Bridgehunter.com ID)

Update Log 

  • 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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