Arch dams through arch action transfers portion of the load of the water thrust horizontally to the side abutments and the other portion of that load is transferred to the dam foundation vertically by cantilever action.   You might also ...

Arch dam is a very fascinating and eye catching structure; so what is an arch dam? as the name implies, arch dam is a curved obstruction from the upstream side singly spanned that mainly carries the load of the impounded water ...