Södertälje sluss

Södertälje sluss is a lock in Södertälje Municipality that connects Lake Mälaren with the Baltic Sea. The structure allows ships to move between these two bodies of water while managing the difference in water levels between them.

The lock was built in 1819 to handle post-glacial rebound effects that continued after the Ice Age. A major overhaul in 1924 made the facility more capable of handling growing ship traffic.

The lock represents a critical element of Swedish maritime infrastructure, enabling commercial vessels and recreational boats to navigate between two major water bodies.

Visitors can watch the lock in operation from observation points when ships pass through. The location is easy to reach and offers a chance to understand how this structure works.

The structure stands as the largest lock in Scandinavia based on permitted ship dimensions, facilitating passage for substantial maritime vessels.