Fürwiggetalsperre, Reservoir in Märkischer Kreis, Germany

Fürwiggetalsperre is a gravity dam of blue greywacke rubble stone built 1902–1904 to Otto Intze's design, 166 m long and 29 m high at its centre, 20 m wide at the base and 4 m at the crown, where two valve houses stand. Its slightly curved wall holds 1.67 million m³ of water at full impoundment, fed by the Verse and five brooks.

The Versetalsperren-Genossenschaft Fürwigge was founded in March 1900 to supply water to hammer works, and the foundation stone was laid two and a half years later. Otto Intze designed the slightly curved dam, built 1902–1904 from blue greywacke quarried nearby at a cost of 746,000 marks. It was renamed Fürwiggetalsperre once the newer Versetalsperre downstream was completed.

The dam is known locally as the Fürwigge, and until the lower Versetalsperre was finished it was called the Obere Versetalsperre. Its reservoir was built to supply water to hammer works, with drinking water for Lüdenscheid as a secondary purpose. The five feeder streams are the Hülsebach, Drögenpütt, Fürwigge, Schürfelder Becke and Brinkbach, joined by the Verse.

A circular walking path of about 4 kilometers circles the entire reservoir, with benches and rest spots located along the route. The paths are easy to walk and offer nice water views and forest surroundings throughout.

The dam was renamed Fürwiggetalsperre only after the larger Versetalsperre downstream was completed; until then it was called the Obere Versetalsperre. Its five flood-relief openings below the crest carried water during the 2021 floods in western and central Europe.