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MILW - Pile-Pontoon Bridge

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; 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)

Categories 

Built 1913 (799)
Built during 1910s (9,124)
Chicago, Milwaukee, St. Paul & Pacific Railroad (939)
Clayton County, Iowa (94)
Crawford County, Wisconsin (20)
Floating (35)
Girder (8,900)
Iowa (6,114)
Lost (20,975)
Lost 1961 (44)
Lost during 1960s (543)
Marquette, Iowa (7)
Mississippi River (208)
Movable (2,804)
Owned by railroad (10,869)
 Plate girder (6,775)
Pontoon (37)
Pony truss (15,459)
Prairie Du Chien, Wisconsin (3)
Railroad (14,205)
Span length 250-500 feet (1,100)
State line crossing (776)
Swing (1,343)
Through girder (3,306)
Truss (30,721)
Uncovered wooden truss (128)
Warren pony truss (3,017)
Warren truss (6,017)
Wisconsin (1,361)

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"

Related Bridges 

Sources 

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