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CP - Oconomowoc River Bridge (3)

Photos 

CP Oconomowoc River Bridge #3

Overview

Photo taken by John Marvig in August 2016

Enlarge

BH Photo #362439

Facts 

Overview
Closed-spandrel arch bridge over Oconomowoc River on Canadian Pacific Railway
Location
Oconomowoc, Waukesha County, Wisconsin
Status
Open to traffic
History
Built 1902
Railroads
- Amtrak (AMTK)
- Canadian Pacific Railway (CP)
- Chicago, Milwaukee, St. Paul & Pacific Railroad (MILW)
Design
Closed-spandrel arch consisting of the following:
1. Stone Voussoir
2. Brick Barrel
3. Concrete Spandrel
Dimensions
Span length: 51.0 ft.
Total length: 51.0 ft.
Approximate latitude, longitude
+43.10778, -88.45335   (decimal degrees)
43°06'28" N, 88°27'12" W   (degrees°minutes'seconds")
Approximate UTM coordinates
16/381746/4773808 (zone/easting/northing)
Quadrangle map:
Oconomowoc East
Inventory number
BH 73403 (Bridgehunter.com ID)

Update Log 

  • February 10, 2022: Updated by Nathan Holth: Clarified detail details.
  • November 5, 2021: New photos from Mark Boettcher
  • August 28, 2016: Added by John Marvig

Sources 

Comments 

CP - Oconomowoc River Bridge (3)
Posted February 10, 2022, by Nathan Holth (webmaster [at] historicbridges [dot] org)

Surprised nobody has commented about these couple unique bridges in this area. The important thing to note is the bridge APPEARS to be unaltered. If it is indeed unaltered it is a very unusual bridge, perhaps illustrating a railroad's early and perhaps cautious attempt to experiment with concrete as a building material, while still holding on to time-tested older designs. Truly a unique design, the arch consists of:

1. Stone Voussoir

2. Brick Barrel

3. Concrete Spandrel

Not sure how often all three materials are found being used structurally as ORIGINAL details. Brick and stone alone is notable on stone arch bridges.