The State Dam Administration of the Free State of Saxony intends to carry out a terrestrial survey of approx. 15.7 km of the Seidewitz from Pirna Brücke An der Seidewitz to the HRB Liebstadt as well as a further approx. 3.0 km of secondary waters, approx. 19.5 km of longitudinal structures and approx. 63 Pieces of bridges plus base structures and culverts.

A two-dimensional hydronumeric model is to be created for the Seidewitz river. The basis for this is the measurement of water, structures and breaklines of the study area from river km 1 + 100 to 16 + 790. The primary objective of the survey is to create a basic plan (digital location and elevation plan) for the water level position calculation, which concentrates on the hydraulically relevant structures of the water hose and consists of height-related, neatly connected line elements and possibly points.

The editing u. The study area stretches along the Seidewitz from Pirna Höhe Brücke An der Seidewitz (river km 1 + 100) through the municipalities of Pirna, Dohna, Bahretal, Müglitztal and Liebstadt to below the HRB Liebstadt (river km 16 + 790) and along another approx. 3 , 0 km of tributaries and 19.5 km of longitudinal structures including the structures. The Seidewitz usually has a bottom width of approx. 5 m to 10 m. The work to be contracted consists of recording breaklines, cross profiles (base width plus edge strips each 10 m from the top of the slope) and measuring structures on and in the water. Furthermore, the existing inventory measurements of the Seidewitz from the estuary into the Gottleuba river km 0 + 000 through the urban area of Pirna to the bridge at the Seidewitz river km 1 + 100 are to be integrated into the documents.