It was built from hardly weathering greenstone (diabase), which was quarried close under the summit of the Eisenberg rising to the right of the dam wall.
Technical data:
Wall height: 42 m
Crown radius: 250 m
Crown length: 194 m
Crown width: 7 m
Bottom length: 90 M
Bottom width: 31 m
The Diemel dam is not used for drinking water supply. When the water level of the Weser is low, it has the task of supplying the feed water for the Mittelland Canal. Another purpose is flood protection.
Today, the Diemelsee-Staumauer and the hydroelectric power plant are listed buildings.