1 vote

UP - Rockport Road Overpass


The East Face

This tunnel is a virtual twin to the arch built over Riverside Street Arch.

Photo taken by J.R. Manning in August 2008


BH Photo #120377



Concrete arch bridge over Rockport Road on Union Pacific Railroad in Janesville
Janesville, Rock County, Wisconsin
Open to traffic
Built 1907
- Bates & Rogers Construction Co. of Chicago, Illinois
- Chicago & North Western Railway (CNW)
- Union Pacific Railroad (UP)
Closed-spandrel concrete arch
Span length: 40.0 ft.
Total length: 40.0 ft.
Also called
MILW - Rockport Road Overpass
Approximate latitude, longitude
+42.67200, -89.03402   (decimal degrees)
42°40'19" N, 89°02'02" W   (degrees°minutes'seconds")
Approximate UTM coordinates
16/333328/4726398 (zone/easting/northing)
Quadrangle map:
Janesville West
Inventory number
BH 34921 (Bridgehunter.com ID)

Update Log 

  • June 16, 2014: New photos from John Marvig
  • September 19, 2012: Photo imported by Luke Harden
  • August 8, 2008: New photos from J.R. Manning


  • J.R. Manning - thekitchenguy [at] sbcglobal [dot] net
  • John Marvig - marvigj27 [at] gmail [dot] com


Rockport Road Bridge
Posted February 25, 2013, by Luke Harden (lukemh9 [at] gmail [dot] com)

Actually, this is the right bridge, the pin was just in the wrong spot

Rockport Road Bridge
Posted February 25, 2013, by Johann Again (johnjohn [at] hmail [dot] com)

And Dude, this is the UP's ex-Chicago and Northwestern giant culvert. The Milwaukee Road's bridge over the same street, is behind you, to the west.

Rockport Road Bridge
Posted February 25, 2013, by Johann (johnjohn [at] hmail [dot] com)

This tunnel was built first, then the dirt was piled up to it. On this low section of bottom land (and just north of Downtown Janesville) the railroads built wooden trestles then dumped dirt to fill them in. You can still see evidence of this at the bridge on North Main Street, just off Centerway. Rockport Road was Western Avenue when this early poured concrete monstrosity was built. The CNW took old growth trees, alive when Chief Blackhawk was a papoose, right next to the ROW and turned them into trestlework. This entire line, from Chicago to Baraboo, was originally double tracked and was the faster route to the Twin Cities rather than going through Milwaukee.