Zdymadlo Lysá nad Labem, River lock in Přerov nad Labem, Czech Republic.

Zdymadlo Lysá nad Labem is a lock on the Elbe River that helps boats move between different water levels while managing the flow of the river. The installation combines a navigation chamber, weir structure, and hydroelectric facilities that work together to control water levels.

Construction of this lock began in 1931 as part of a major Elbe River regulation project. The hydroelectric component was added later and started operating in 1948 after wartime delays.

The lock is named after Lysá nad Labem, but the chamber and weir stand in Přerov nad Labem after a land swap between the two municipalities; only the small power plant and its bank buildings lie in Lysá. Until 2015 the cadastral map still showed the meander of the unregulated Elbe, and oxbow remnants such as Hrbáčkovy tůně survive in the landscape.

Boat operators can communicate with lock personnel via radio to coordinate passage through the facility. The lock operates during daylight hours and weather permitting, so check local conditions before visiting with a vessel.

The fish passage is 1.2 m wide and is not a single channel: it runs through the left weir pier and along the right wall of the navigation chamber. The lock and weir stand in Přerov nad Labem, while the small power plant on the right bank belongs to Lysá nad Labem.