The floods in January / February 2008 revealed that due to changes in retention and drainage capacity of Zorge and inadequate flood control facilities for the communities Windeshausen, Bielen and Görsbach is a partially flood affected and a significant risk of flooding during extreme flood events.
Measures for the local situation Bielen:
On the boundary between the existing building and the field flood protection dike is built. The approximately 530 m long flood protection dike extends north to the street "Am Mühlgraben" and includes the south to the ramp of the road bridge (Mark Street) at. In the southern portion of the dike for about 130 m on the left runs Zorgeufer. The maximum height of the dikes is about 1.50 m, including a freeboard of 0.50 m. On the air side (for construction toward) is a flood defense provide. The dike itself is not passable. When a crown width of 1 m and a maximum height of 1.50 m results with a slope of 1: 3 and about 3 m wide companionway of a maximum required width of approximately 13 m.