Due to its lively discharge characteristics and considerable bedload transport the Gössering stream poses a veritable risk for the settlements close to its bed. Weißbriach, St. Lorenzen, Jadersdorf and Hermagor give home to about 8.000 people living in the south-west of the Austrian province Carinthia. Topology favours the construction of a flood detention basin in the wider, upper part of the Gitsch-Valley thus protecting Jadersdorf, St.
Lorenzen and Hermagor by reducing the flow of a 100-year event to the discharge of a 30-year flood. Additional structures along the river, especially between Hermagor and the Gail River, are necessary for the save passage of these amounts of water and bed-load. They are discussed in this paper.
Under the premises of landscape conservation and limited budgets a solution featuring an overflow dam is compared to a conventional one.
Further technical measures and the necessary planning of operational and emergency procedures provide for the safety of people, cultural heritage, economic production and present values. An extensive documentation of the actual situation constitutes the basis for the estimation of possible impacts of the proposed measures on the natural and human habitat.