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The IJssel Line was a NATO line of defence against the Soviet Union and its allies during the Cold War.

During the 1950s of the previous century, the government decided on a plan to inundate both sides of the IJssel River Valley in order to delay a feared invasion by the enemy.  This plan was top secret until 1990.

The IJssel Line Foundation is a 100% non-profit volunteer organization. The Foundation restores and administers remnants of the line of defence along the IJssel River.  From 1950 until 1968 the line of defence was intended to delay a possible invasion of the Red Army by flooding a wide zone along the river.  After the top secret classification ended – at the end of 1990 – new information became available through archival research and oral history (interviews with military and civilian representatives who had been directly involved with the IJssel Line) which provided valuable insights.  The Foundation also provides guided tours of bunkers restored to their original condition.  An example is the anti-aircraft emplacement (Terp), a large bunker complex with enormous fire power.


Guided tours are given throughout the entire year. Click here

Feel free to enquire about the possibilities for a guided tour tailored to your own interests.  Consider a combination of a guided tour together with a video presentation / lecture in order to obtain a very complete overview of the IJssel Line.


Feel free to telephone +31 6 51 41 72 40 or send an e-mail.  We will be happy to assist you.

Hydrological elements

The IJssel Line Foundation offers a variety of guided tours to the public

for visiting the bunkers and other elements.

Stichting De IJssel line is aimed at the IJssel River as a faithful and tangible monumental defensive work of the cold war to recover to manage and maintain, and this defensive work from educational and recreational purpose to open up to the public.


The purpose of this website is to inform the public about the activities of Foundation The IJssel line.






Overview map