The aim of this thesis was to obtain a status analysis of the Sackbach/Sandenwaal, an irrigation and drainage ditch flowing through central Vintschgau, which had been stepwise re-naturalized using so-called edge-pile-walls.The investigation concerned: the status of the corresponding logs,the profile building of the river, the development of planting. Main attention was paid to the edge-pile-walls, especially the larch logs built in the years 2002 to 1993. The investigation itself was performed with a resistograph which determines the resistance of the wood and gives an overview over the individual status of the logs. In particular, differences in the various age periods, the influence of the vegetation, and the proximity of the drilling position to the water level were compared. The determination of the river bed profiles were used to prove possible undulations of the river and a corresponding structuring of the river bed. Since rivers and creeks which have been secured by pile walls show usually straight and linear courses, an undulation and a structuring of the bed would indicate ecological quality. The vegetation of the pile walls was registered by means of checklists and studied with regard to density per meter, vitality of the individual plants, damages, number of trunks, height and distribution of species. As a conclusion it can be said that , considering the results of the investigation of all pile walls, those of the period UIIIb 1993 and UIIIb 1994 show the best results in all categories. That means that, concerning the state of the logs, it is not the age that is the decisive factor but rather the type of construction and the shading. Apparently, a low and referred to the riverbed wide construction type of the pile walls with a resulting high water level and good shading by willows along the banks has positive consequences for the durability of the logs. This latter type of construction promotes also a manifold structuring of the river bed.