As in section 3 of the Licca Liber project, a dynamic self-development of the Lech is also conceivable in section 4. This should take place either on the west or east bank. The respective other bank section will be designed close to nature. Below the crash structure at river kilometre 50.4 the deepening of the river Lech is the greatest. Therefore, at this point sole-supporting measures such as a rough ramp are necessary to raise the river bed to the 1999 level (before the flood). The handling of the fall structure at river kilometre 50.4 remains uncertain until the detailed planning. How the slope can be overcome depends to a large extent on how much of the slope can be removed upstream and how much of the bed can be raised downstream. The use of hydroelectric power must be examined after the detailed planning has been completed. In order to minimize the risk of structural damage due to low groundwater levels in Kissing, the Auensee was not included. The Gießer overflow is to be connected to the Lech river to link the city forest streams. This will be done taking into account the functionality and safety for the wells near the river for the water supply of the city of Augsburg. The connection can therefore not be subject to any dynamic development. 

The measures are part of the project Licca Liber.