|Dam and spillways|
|Height (foundation)||23.5 m (77.1 ft)|
|Height (thalweg)||21.5 m (70.5 ft)|
|Length||275 m (902 ft)|
|Elevation at crest||216.5 m (710.3 ft)|
|Width (crest)||6 m (20 ft)|
|Width (base)||135 m (443 ft)|
|Total capacity||430,000 m3 (15,000,000 cu ft)|
|Active capacity||9,100,000 m3 (320,000,000 cu ft) |
|Catchment area||125.1 km²|
|Surface area||76 ha (0.76 km²)|
|Maximum length||2.75 km|
|Maximum width||ca. 300 m|
The Twistesee is located at the northern end of the Langer Wald around 30 km as the crow flies west-northwest of Kassel between Bad Arolsen in the west, Volkmarsen to the northeast and Wolfhagen to the southeast. The reason for its construction was the so-called Henry Flood (Heinrichsflut) on 16/17 July 1965 that caused serious damage and destruction in the catchment areas of the Twiste and Diemel rivers. Near one riverside village, Wetterburg, the Twiste was impounded by a dam to form a very large flood retention basin in order to control the water level.
Among the sights in the vicinity of the Twistesee are:
- Bad Arolsen, the best known destination near the reservoir.
- Neu-Berich, a village with an interesting past, near the lake.
- Landau, somewhat southeast of the reservoir, has an historical old town which is entirely protected, a palace, an historical town church and the Landauer Wasserkunst, an historical water supply system.
- Near Volkhardinghausen, not far south of the reservoir, stands the French Oak (Franzoseneiche).
- Information about the Twistesee at wasserverband-diemel.de
- Peter Franke, Wolfgang Frey: Talsperren in der Bundesrepublik Deutschland. DNK – DVWK 1987, ISBN 3-926520-00-0