Zdymadlo Přelouč, Navigation lock in Přelouč, Czech Republic

Zdymadlo Přelouč is a navigation lock on the Elbe River that regulates water levels for inland shipping. The facility consists of two steel gates approximately 21 meters wide and operates alongside a hydroelectric power station.

The weir and lock at Přelouč were built as part of the Elbe waterway, and the small hydroelectric power station on the left bank began operating in 1927 with four Francis turbines made by Josef Prokop & synové of Pardubice. Two of those original turbine sets still run; the other two were replaced in 2003 by vertical Kaplan units. The complex, including the bridge and control towers, is a listed cultural monument.

The lock chamber, 85 by 12 metres with a 3-metre depth, has stood unused since the planned downstream stage Nová Přelouč was never built, making it the only lock on the whole Elbe not in service. The weir, lock, bridge with control towers, power plant building no. 139 and staircase are listed together as a protected monument complex.

The lock sits at river kilometre 951.905 on the Elbe's northeast edge of Přelouč, where Hradecká street (road II/333) crosses the river on the structure's bridge toward Břehy and Lázně Bohdaneč. The lock chamber itself is out of service for navigation because the downstream Nová Přelouč step was never built.

The power station next to the lock installed solar panels on its roof in 2009 to generate additional electricity. This blend of early 20th-century water power with modern solar technology makes the site a practical example of renewable energy over time.