The Hosterwitz waterworks on the Elbe near Dresden makes an important contribution to the drinking water supply of the Saxon state capital by pumping and treating up to 84,000 m³ of bank filtrate from the Elbe per day. The waterworks is protected from floods of up to approx. HQ20 by the outer protective dyke. This dyke was heavily strained during the flood events of 2002, 2006 and 2013 and was completely flooded several times. The company premises were dammed up and the dyke had to be slit to drain due to the lack of internal drainage. During flood events in which the dyke crest was not flooded, seepage was observed at the foot of the dyke on the air side.
Since the 2006 floods, initial plans have been made to upgrade the dyke. In order to eliminate existing deficits, the outer protective dyke is to be upgraded and an overflow sill, a sieve structure, a surface load filter and a seepage water drainage system are to be retrofitted.
Between 2017 and 2019, THP's Dresden division (then Lahmeyer Hydroprojekt) drew up the design and approval planning for upgrading the outer protective dyke. This was presented to the environmental agency in 2019 and the documents were submitted for technical review and comment. Further planning services have now been commissioned due to changed boundary conditions on the company premises.
Client: SachsenEnergie AG
Processing period: 2017 - currently
Services:
Site visit with coordination meeting
Review of documents and creation of line inventory plan
Plausibility check of existing documents
Project planning of engineering structures, work phases 3-4
Structural planning service phase 1-4
Adaptation of planning due to changed boundary conditions
Extension of planning documents