Froschgrundsee also known as Schönstädtspeicher is a

retention basin A retention basin, sometimes called a wet pond, wet detention basin, or stormwater 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 stormwater r ...

to protect the city of

Coburg Coburg () is a town located on the Itz river in the Upper Franconia region of Bavaria, Germany. Long part of one of the Thuringian states of the Wettin line, it joined Bavaria by popular vote only in 1920. Until the revolution of 1918, it ...

Bavaria Bavaria ( ; ), officially the Free State of Bavaria (german: Freistaat Bayern, link=no ), is a state in the south-east of Germany. With an area of , Bavaria is the largest German state by land area, comprising roughly a fifth of the total lan ...

from the

flood A flood is an overflow of water ( 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 an area of study of the discipline hydrol ...

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 feeds ...

, 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 (german: Oberfranken) is a ''Regierungsbezirk'' (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 F ...

. 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