7 kilometers and mouth is situated 550 meters above sea level - the stream is very steep. It makes one of the most valuable parts of The High Ash Mountains Protected Landscape Area. Lower reaches, flowing through the village of Kouty nad Desnou, is regulated and banks are strengthened by stone walls. In 1921, the locality of Hučivá Desná was hit by torrential rain. Mud from a slope of Červené hora peak with an area of 16 ha, flowed into the valley of Hučivá Desná. About 50 000 m3 of mud created a dam. The dam later ruptured and enormous amount of water devastated whole Desná valley. As a result, a construction of man-made dam as a protection against floods was debated. However, this plan has not been realized and is not discussed at all now. Divoká Desná Divoká Desná (literally Wild Desná) originates from a north slope of Kamzičník peak, 1310 meters above sea level. The length is 12 kilometers and the mean annual discharge at its mouth is 1.5 m³/s. Pumped storage plant is situated on the creek. A dam called Dlouhé stráně – dolní (literally Long Hillsides – lower) was constructed. The lake has a volume of 3 405 000 m3 and occupies area of 11,2 hectares. Water from the lake is pumped to the Dlouhé stráně –horní (literally Long Hillsides – upper), situated on the top of Dlouhé stráně peak, 1350 meters above sea level. Whitewater kayaking or canoeingis practiced in a part below the dam. References External links Rivers of the Olomouc Region Šumperk District