100 Years of the Bielkowo Hydropower Plant - A Century of Sustainable Energy and Engineering Heritage
Commissioned in 1925, the Bielkowo Hydropower Plant celebrates its centenary this year, marking 100 years of continuous operation. As the largest small hydroelectric plant (SHPP) operated by Energa Wytwarzanie, with an installed capacity of 7.2 MW, Bielkowo stands as both a significant contributor to Poland’s renewable energy mix and a remarkable monument of early 20th-century industrial engineering.
In brief
The Bielkowo hydroelectric plant, built in 1925, celebrates its 100th anniversary as the largest small hydropower plant of Energa Wytwarzanie, with an installed capacity close to 7.2 MW. The facility is a diversion plant on the Radunia cascade, with a 3,500 metre canal, a 54 hectare reservoir, a 44.5 metre head and three generating sets with Voith Francis turbines and Siemens-Schuckert generators. The Bielkowo plant was built by the Senate of the Free City of Danzig after water rights were taken away from the Schichau shipyard. After wartime damage, operation resumed on 15 November 1945.
Smart Design, Timeless Efficiency
Situated along the Radunia River, Bielkowo is the second of eight hydro plants in the Radunia cascade system. Its location was strategically selected based on a natural river loop between Górne Kolbudy and Bielkowo, where the river stretches over 11 km with a natural elevation drop of nearly 50 meters. Engineers capitalized on this topography by constructing a 3.5 km artificial canal to create a high head hydro scheme using the shortest possible route—a hallmark of diversion-type plants.
Technical Specifications and Peak-Load Operation
Bielkowo operates as a diversion-type peak-load plant. It features a 54-hectare reservoir, artificial canals, pressure pipelines with a net head of 44.5 meters, and three identical Francis turbines manufactured by Voith. The original generators, produced by Siemens-Schuckert, remain in operation—testament to their durability and to the effectiveness of consistent modernization.
The plant delivers power to the grid via six 15 kV transmission lines and is primarily operational during peak demand hours in the morning and evening, contributing to grid stability and demand-side management.
A Complex History
Originally initiated by the Schichau Shipyard, the Bielkowo project was later taken over by the Senate of the Free City of Danzig after a legal dispute. Along with the smaller Łapino plant commissioned in 1927, Bielkowo was part of a broader strategy to secure energy independence through the use of the Radunia River's natural elevation.
The plant also played a notable role during World War II. In 1945, it was fortified as a military position by retreating German forces. Critical equipment was dismantled and removed, and artillery damage left visible scars—some still present on the steel penstock today. The plant’s tower was also used to hide official documents and historical artifacts, such as the statue of St. George from Gdańsk’s shooting gallery.
Living Industrial Heritage
Remarkably, Bielkowo resumed operations on November 15, 1945—just months after the end of the war. Since then, it has operated without interruption, undergoing periodic upgrades that have preserved both its operational efficiency and its historic character.
The plant is part of the Pomeranian Hydrotechnical Heritage Trail and is widely regarded as a gem of interwar industrial architecture. While its turbine hall houses modern equipment, its original design and atmosphere remain intact. Surrounded by rich natural biodiversity, Bielkowo is also a haven for birdwatchers and nature enthusiasts.
Relevance in the Renewable Era
As the global energy sector embraces decentralization, flexibility, and sustainability, century-old facilities like Bielkowo prove that small hydro still plays a vital role. With their high capacity factor, dispatchability, and low environmental footprint, SHPPs continue to offer resilient, clean energy solutions—especially when integrated into modern smart grid systems.
The 100th anniversary of Bielkowo is not just a milestone for Polish hydropower—it is a reminder of the enduring value of well-engineered, renewable infrastructure in shaping a sustainable energy future.
Source: Gazeta Morska · Compiled by: Kamil Kusier
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