The dam's construction involved the first large-scale use of aerated concrete in the former Czechoslovakia.
The reservoir flooded the historic Svatojánské proudy (St. John's Rapids), once a dangerous section for log rafters.
During construction, a temporary town was built to house the thousands of laborers working on the site.
The dam is classified as a water structure of national importance due to its role in the Vltava Cascade flood management system.
The reservoir area is a popular filming location for many Czech movies due to the dramatic landscape.
A specialized funicular-style track system was used during construction to transport massive amounts of materials into the valley.
Slapy Dam is a concrete gravity dam on the Vltava River, standing 67.5 meters tall and stretching 260 meters in length. Constructed between 1949 and 1955, it was designed primarily to protect Prague from flooding and to generate hydroelectric power. The dam creates the Slapy Reservoir, which covers approximately 27 square kilometers and reaches depths of up to 58 meters. It is the second-largest hydroelectric power station in the Vltava Cascade system. The complex includes three Kaplan turbines with a total installed capacity of 144 MW. Beyond its industrial utility, the reservoir serves as a major recreation hub for swimming, boating, and fishing. The surrounding terrain features steep, forested slopes and a highly fragmented shoreline. The reservoir spans 44 kilometers along the Vltava riverbed.
The viewing platform overlooking the dam structure from the access road above.
Bring polarized sunglasses to reduce glare from the water if you plan on photography.
Wear sturdy footwear if you intend to hike the steep trails surrounding the reservoir perimeter.
Rent a boat from a local marina to access the quieter, less accessible coves along the shoreline.
Do not attempt to swim near the dam wall, as currents and safety protocols are strictly enforced.
Respect designated swimming zones and private property along the shoreline; maintain noise levels in residential lakeside areas.
