Rating:
53749
{77}%
1 vote
UP - Hoffman Swing Bridge
Description
The St. Paul Bridge & Terminal Railway built the bridge between 1909 and 1910. It was leased to the Chicago Great Western in 1935. The CGW merged with the Chicago & North Western in 1968, and the bridge became Union Pacific property when it purchased the C&NW in 1995.
Facts
- Overview
- Warren through truss bridge over Mississippi River on Union Pacific Railroad
- Location
- St. Paul, Ramsey County, Minnesota, and Dakota County, Minnesota
- Status
- Open to traffic
- History
- Built 1909-10 for St. Paul Bridge & Terminal Railway, Swing Span Rebuilt 1956
- Railroads
- - Chicago & North Western Railway (CNW)
- Chicago Great Western Railway (CGW)
- St. Paul Bridge & Terminal Railway (StPB&T)
- Union Pacific Railroad (UP)
- Design
- Warren through truss center pivot swing span with pratt truss and deck plate girder approaches.
- Dimensions
-
Length of largest span: 401.0 ft.
Total length: 1,275.0 ft.
- Also called
- CGW - Mississippi River Bridge
UP - Mississippi River Bridge
CGW - Hoffman Swing Bridge
- Approximate latitude, longitude
- +44.91883, -93.05013 (decimal degrees)
44°55'08" N, 93°03'00" W (degrees°minutes'seconds")
- Approximate UTM coordinates
- 15/496043/4973934 (zone/easting/northing)
- Quadrangle map:
- Saint Paul East
- Inventory number
- BH 53749 (Bridgehunter.com ID)
Update Log
- April 4, 2018: New photos from John Marvig
- October 31, 2017: Updated by Alexander D. Mitchell IV: Expanded history
- March 28, 2014: New photos from John Marvig
- October 9, 2012: Photo imported by Luke Harden
- October 4, 2012: New photos from John Marvig
- October 3, 2012: Photo imported by Luke Harden
- October 3, 2012: Added by John Marvig
Sources
- John Marvig - marvigj27 [at] gmail [dot] com
- Alexander D. Mitchell IV
- Douglas Butler
I found a file with an Authorization For Expenditure (AFE) dated 1956 regarding the modern swing span on this bridge, from the Chicago & North Western Railway Historical Society:
============
description - Reconctruction of swing span of Mississippi River Bridge at So. St. Paul, Minnesota.
description-additional - The old center pier was underminde by flooding to extent that bridge was unsafe for operation & complete swing span has to be removed to permit navigation.
description-continued - Center pier replacement covered by AFE-11575.
orignial estimated cost - $535,578.94
work started - 1954/07/01
work completed - 1956/11/30
completed net estimated cost - $535,578.94
remarks-1 - dept J-2349
remarks-2 - see AFE notes
- - - - -
note-1 per "details of estimated cost" pages attached to the AFE:: Construct a 400-Ft steel thru truss swing span complete with new deck, electrically operated turning machinery, operators house & machinery house replacing old 400-Ft steel swing span with engine driven turning machinery.