The higher quantities of water in the old course of the Aare below Winznau not only enrich the habitat of animals living in and around the water. They also upgrade the river banks for leisure activities and those seeking relaxation. However, there are certain risks for those spending time near the water below the weir. That is because floods can occur even if there are no storms or heavy rainfall. If the machines at the Gösgen power plant fail due to damage, very large amounts of water would immediately have to be discharged via the old Aare. Each of the five machines processes up to 70 m3 of water per second. Fortunately, such failures rarely occur. Nevertheless, anyone enjoying the river landscape on the banks of the old Aare should always remain alert. The water level could rise significantly at any time, and the quantities of water could increase to well over 15 to 25 m3 per second even when the sun is shining and there's not a cloud in the sky.