Irsingener See, reservoir in Germany

The Irsingener See is a 0.29 km² reservoir on the Wertach, impounded by a power-plant weir with two generators. It lies across the municipalities of Bad Wörishofen, Türkheim and Wiedergeltingen, measures 1.1 km long and 0.5 km wide, and sits at 617 m above sea level. A sailing club with a landing stage occupies the western shore.

Construction of the Irsingener See began in 1962 as a dam on the Wertach; it was completed in 1964 when the hydroelectric plant with two generators went into operation. The reservoir lies across the municipal areas of Bad Wörishofen, Türkheim and Wiedergeltingen. In 2011 a fish ladder was added on the east side of the dam.

Locals sometimes call the lake Bad Wörishofener Stausee, after the spa town of Bad Wörishofen whose municipal area it partly lies in. The sailing club on the western shore, the Bad Wörishofener Segelclub, uses the water for its boats and has a landing stage there.

The lake lies southeast of Irsingen, shared by Bad Wörishofen, Türkheim and Wiedergeltingen, and is reached from the surrounding roads; the sailing club with its jetty is on the west bank. The dam with its weir and two generators stands at the outflow, and since 2011 a fish ladder runs along the east side of the dam wall. The water measures about 1.1 km by 0.5 km at 617 m elevation.

Since 2011, a fish ladder beside the dam helps fish travel upstream past the barrier to support local fish populations. This structure demonstrates efforts to balance nature's needs with energy production.