Back to TypesTypes of Dam - Gravity Dam
Claerwen Dam in Wales
Cross-section through gravity dam
A cross-section (or slice) through a gravity dam will usually look roughly triangular.
Gravity dams are suited to sites with either wide or narrow valleys, but they do need to be built on sound rock.
There are more than 250 gravity dams in Britain. Masonry was used in many early dams, as far back as the 17th Century. However, concrete became more common from about 1900.