CN/DM&IR 1916 Bridge over St. Louis River at Oliver, WI

(Archived Bridge Hunter; Bridge Hunter, no Historic Bridges, John Weeks III) For John Marvig, I found an Oliver Approach Bridge, but not his bridge.

DM&IR = Duluth, Missabe & Iron Range Railway

3D Satellite, 15 photos

Its center pier design is rather unique.

John Weeks III

rtands
CN wrapping up Oliver Bridge work

"A dozen different railroads have trackage rights over the bridge, resulting in very heavy traffic." [John Weeks III]

Update:

DOT

DOT
Innovative design of a swinging, double
-deck, Warren through/deck truss main 
span with rail traffic above and vehicular 
traffic below, created to meet 
challenging site conditions and federal 
regulation. This feature includes a 
center-pivot bearing mechanism for the 
swing span.

DOT
Design and construction of the double-deck, steel approach 
viaduct spans created to accommodate challenging site 
conditions and heavier loads.

Larry Mishkar posted seven photos with the comment: "A fine day to ski around the Oliver Bridge location. It's nice to see the long disused center turning mechanism up close. One question for our historians: Why did the DM&IR build a three span deck girder bridge over the NP/LS&M track when a single span would have done the trick? East and west of these spans is the massive raised roadbed. TIA!"

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Brads McBeermug commented on Larry's post

Brads McBeermug commented on Larry's post

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MnDOT
"

Innovative design of a swinging, double-deck, Warren through/deck truss main span with rail traffic above and vehicular traffic below, created to meet challenging site conditions and federal regulation. This feature includes a center-pivot bearing mechanism for the

swing span.