Froschgrundsee, also known as Schönstädtspeicher, is a

retention basin A retention basin, sometimes called a retention pond, wet detention basin, or storm water management pond (SWMP), is an artificial pond with vegetation around the perimeter and a permanent pool of water in its design. It is used to manage ...

to protect the city of

Coburg Coburg ( , ) is a Town#Germany, town located on the Itz (river), Itz river in the Upper Franconia region of Bavaria, Germany. Long part of one of the Thuringian states of the Ernestine duchies, Wettin line, it joined Bavaria by popular vote only ...

Bavaria Bavaria, officially the Free State of Bavaria, is a States of Germany, state in the southeast of Germany. With an area of , it is the list of German states by area, largest German state by land area, comprising approximately 1/5 of the total l ...

from the

flood A flood is an overflow of water (list of non-water floods, or rarely other fluids) that submerges land that is usually dry. In the sense of "flowing water", the word may also be applied to the inflow of the tide. Floods are of significant con ...

ing of the

Itz The Itz () is a river of Thuringia and Bavaria, Germany. The Itz is long and a right tributary of the Main. The Itz begins in Sachsenbrunn (Stelzen), Thuringia and flows southward through Bachfeld and Schalkau. It crosses into Bavaria and ...

, Effelder, and the Grümpen. It lies in the municipality of

Rödental Rödental () is a town in the district of Coburg, northern Bavaria, Germany, 7 km northeast of Coburg. Rödental was the name given to a group of municipalities that united 1971, including Mönchröden, Oeslau, Einberg, Oberwohlsbach and U ...

Upper Franconia Upper Franconia (, ) is a (administrative 'Regierungs''region 'bezirk'' of the state of Bavaria, southern Germany. It forms part of the historically significant region of Franconia, the others being Middle Franconia and Lower Franconia, wh ...

. Froschgrundsee was completed in 1986 after four years of construction and cost 43 million DM in operations.

References

Geography of Bavaria RFroschgrundsee {{Germany-bridge-struct-stub