The Voorsters lock is located near Kraggenburg, between the Kadoelermeer lake and the Zwolse Vaart canal. Together with the Smeenge pumping station and the lock keeper's house, this lock has listed status. Its construction marks the beginning of the Noordoostpolder (it was completed in 1941) and the lock is among the oldest surviving structures in the Noordoostpolder. The Voorsters lock is a national monument.
The Voorsters lock has a height difference of 7 metres. The lock complex consists of a lock, a pumping station (Smeenge pumping station) and a movable bridge. Through the lock, boats can exit the Noordoostpolder , onto the Zwarte Meer, or enter the Noordoostpolder , onto De Zwolse Vaart.
