1 vote

Hinderman Bridge


Side view of the bridge

Photo taken by MnDOT in 1941; submitted by Jason Smith

License: Released into public domain

BH Photo #290612



Lost Pratt pony truss bridge over Minnesota River on Township Road
Home, Brown County, Minnesota, and Nicollet County, Minnesota
No longer exists, removed after 1987
Built in 1905 to replace a ferry operated by Captain Hinderman, damaged by flooding in 1951 but was later rebuilt, closed to traffic in 1987, later removed.
Pratt pony truss with pinned connections
Total length: 259.0 ft.
Approximate latitude, longitude
+44.40877, -94.67945   (decimal degrees)
44°24'32" N, 94°40'46" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/366279/4918647 (zone/easting/northing)
Quadrangle map:
Sleepy Eye NW
Inventory number
BH 62299 (Bridgehunter.com ID)

Update Log 

  • August 5, 2014: Added by Jason Smith



Hinderman Bridge
Posted December 15, 2014, by Don Morrison


And neither this or the Aulwurm bridge have been assigned the lally column category. I'll leave it to you guys, since it's your discovery and discussion.

Hinderman Bridge
Posted December 15, 2014, by Matt Lohry


This type of support system is referred to as a caisson system, in which the supports are mainly steel tubes filled with concrete (or, in some cases, concrete columns), with sparse bracing in between for stability. They are also referred to as "Lally columns". This was very common with multiple-span truss bridges for many decades from the mid-1800's till around 1920, mainly with the older pin-connected bridges. Type "Lally" into the search bar on the home page, and most of the bridges that turn up feature this type of support system. Hope this helps!

Hinderman Bridge and Aulwurm Drive Bridge
Posted December 14, 2014, by Roger Deschner (rogerdeschner [at] gmail [dot] com)

I am struck by a similarity in design of two very old multi-span pony truss bridges - this lost one, and the extant but derelict Aulwurm Drive Bridge near Chicago http://bridgehunter.com/il/cook/aulwurm-drive/ (Best photos at http://www.historicbridges.org/bridges/browser/?bridgebrowse...). Both bridges are shrouded in some mystery. Though the trusses themselves are different, the piers and bents (or lack of bents) look almost the same. Sturdy round concrete pairs of piers, crossbraced to one another only by light trusswork, in lieu of a big sturdy bent. Was this a common construction technique for very old multi-span pony truss bridges? Are there others like these two?