The original dam, completed in 1915, failed in 1916 due to construction flaws, resulting in a disaster that claimed 65 lives in the town of Desná.
The current dam is a rock-fill construction with a central clay core, differing from the original masonry structure.
The reservoir is managed by Povodí Labe and serves as a vital component of the regional water management system.
It is a key starting point for the 'Jizerská magistrála', a famous network of cross-country skiing trails.
The area is protected under the Jizera Mountains Protected Landscape Area designation.
The reservoir's water is naturally acidic due to the local peat-rich soil, requiring extensive treatment before human consumption.
During harsh winters, the area frequently experiences some of the lowest temperatures recorded in the Czech Republic.
Souš Reservoir is an embankment dam located in the Jizera Mountains that serves primarily as a drinking water source for the Liberec region. Constructed between 1911 and 1915, it replaced a structure that collapsed during the catastrophic flood of 1916. The reservoir reaches a maximum depth of 19 meters and has a total surface area of 85 hectares. It is situated at an elevation of 772 meters above sea level. Public access to the water's edge is strictly prohibited to protect the high-quality water supply. The surrounding landscape consists of protected peat bogs and dense spruce forests characteristic of the Jizera Mountains. A paved road runs along the northern bank, providing a popular route for cyclists and pedestrians connecting Desná to the Souš settlement.
The bridge over the reservoir inlet for panoramic views of the water against the forest backdrop.
Bring a windbreaker, as the open expanse of the reservoir and high altitude can lead to rapid weather changes.
Combine your visit with a hike into the nearby Černá Desná river valley to see the series of waterfalls.
Check local snow conditions before visiting in winter, as the road to the reservoir is often prioritized for cross-country skiers.
Attempting to descend to the water level, which is illegal and environmentally damaging.
The road passing the reservoir is occasionally closed to motor vehicles during heavy winter snowfalls.
Swimming, boating, and fishing are strictly prohibited to preserve the drinking water quality.
