Talsperre Koberbach, reservoir in Germany

Talsperre Koberbach is a reservoir in the Zwickau district of Saxony, impounded by an earth-fill dam with an inclined clay seal. The dam, Germany's first modern earth-fill dam, holds back the Koberbach and Erdbach streams. A pre-dam built in 1972 stands upstream, and the lake covers about 0.24 square kilometres at an elevation of 273 metres.

In 1925 the Neukirchen manufacturer Guido Wolf founded a joint-stock company to supply the Crimmitschau textile industry with process water. Construction began in spring 1926 after twelve years of preparation; about 69 hectares were acquired and a 3 km stretch of the Kleinbernsdorf–Langenhessen valley road was relocated. The dam, costing 4.2 million marks, opened in October 1929 after three years of building. The company was liquidated in 1953 and the reservoir passed into state ownership; today the Saxon dam administration (Zwickauer Mulde / Obere Weiße Elster) is responsible for it.

Since 2010 the Koberbach triathlon has been held here each year and has become the reservoir's regular sporting event. Anglers, sailors and divers share the water, and a boat rental, campsite and restaurants stand by the shore. The dam's overflow and the 1972 pre-dam are visible from the water.

The reservoir lies in the Koberbach valley northwest of Zwickau, in the districts of Langenhessen and Niederalbertsdorf. The Koberbach triathlon has been held here every year since 2010. The reservoir is an official bathing water, and a boat rental, campsite and several restaurants are on site.

The reservoir's dam was the first modern earth-fill dam in Germany, built with an inclined clay seal. The Koberbach and Erdbach feed the lake, and a smaller pre-dam was added upstream in 1972. Since 2010 the Koberbach triathlon has been held here each year.