Mystery Bridge Nr. 156: A Pair of Twins in the former District of Schleswig

All photos taken in August 2021


After a three-week absence due to vacation, I’m back online in the Chronicles, playing catch-up due to some bridge-related events that happened while I was away. But I thought I would show you some of the bridges I visited during my vacation, namely the former district of Schleswig.

This district featured a region where the northern half now belongs to Denmark; the southern half to the German state of Schleswig-Holstein and it extended as far south as the Baltic-North Sea Canal and as far north as the area between Kolding and Esbjerg and includes towns like Schleswig, Flensburg, Dagebüll, Husum and Kappeln on the German side, as well as Sonderburg, Hoyer, Abernaa, Haderslev and Ribe on the Danish side. The region was a focus of two military conflicts in 1851 and again in 1864, plus German conquest under Hitler from 1940 on, when the army invaded and occupied all of Denmark. The country was reestablished in 1945 when the war end. The region of Schleswig was cut in half thanks to a referendum in 1920, and the German-Danish border today is based on that historic vote, although minorities exist on both sides of the border. Flensburg is considered a border town with 30% of the Danish population living there- the highest for a community in Germany- even though it’s technically located in Germany.

And this takes us to this mystery bridge, which features not only one bridge, but two very identical structures located on the road connecting Aventoft in Germany and Tonder on the Danish side- only five kilometers apart. The bridges themselves span the River Vida- only a kilometer apart from each other!

The bridges themselves feature a cross between a Schwedler and a Parker pony truss span because of their polygonal upper chords. The connections are welded, which places the construction date to sometime between 1890 and 1920. There are no inscriptions in the metal of the bridge. They are between 25 and 30 meters long and have a width of 3.5 meters each.

What is unique about the bridges are its outriggers. These diagonal beams that are formed at a 70° angle and found on the outer portions of a truss bridge to support the panels and lower chords of the structure. The outriggers of this bridge is found at an 80° angle, but pointed towards the inner portion of the bridge. Furthermore these outriggers are filled in, thus making it one of the most unique truss bridges I’ve ever seen.

There is no information on the bridge’s history through any of the websites devoted to even architecture and infrastructure, nor are there any local records of the bridge’s history, even in Danish. The only websites that had a photo of the bridge was a Komoot website focusing on a tour along the German-Danish border and a fishing website looking at places where to fish in Denmark.

This is why the search for the bridges’ history falls to the locals on either side of the border. What we would like to know is the following:

  1. When were the bridges built?
  2. Who designed and built the two structures?
  3. What are the exact dimensions of the bridge
  4. Are there any stories behind the bridges? Since they are located right at the border, they played a key role in border controls and the like.

Do you have any stories, history and facts behind them? Then provide a comment below or send them to me, using the contact details provided here.

I’ve restarted my project to write about the bridges of Schleswig-Holstein and would like to add the bridges to the list of others that will be highlighted. If you are interested in contributing, feel free to do so. Details on my project can be found here.