Nová vodní elektrárna Háj, Hydroelectric power station in Třeština, Czech Republic

Nová vodní elektrárna Háj is a hydroelectric power station situated along the Morava River, equipped with two Francis turbines. The turbines sit above an artificial water channel on the left bank and supply electricity to the surrounding region.

Karel Plhák, son of Hubert Plhák, commissioned the new station in 1921; architects Bohuslav Fuchs and Josef Štěpánek drew up the plans and the Olomouc firm of Bernard Sychrava built it in 1921–1922. It replaced the 1908–1909 Stará elektrárna Háj, which had introduced alternating current, and it still operates today.

The architects embedded wave-like decorative patterns into the building's facade to symbolize water and energy transformation. These ornamental details give the industrial structure an artistic quality that goes beyond its practical function.

The plant is still in operation, so the interior is not open as a museum. The inlet structure on the right bank of the Morava, part of the national cultural monument, is reached from the weir at river kilometre 283.9. The six inlet gates are worked by electric motors from a reinforced-concrete footbridge on concrete supports.

The central control hall preserves original marble switchboards with brass elements dating from the building's creation. Large factory windows flood this space with natural light, creating a surprisingly bright working environment for an industrial facility.