The first constructed dams were gravity dams, which are straight dam made of masonry (stone brick) or concrete that resists the water load by means of weight. Around 2950-2750 B.C, the ancient Egyptians built the first known dam to exist. The dam was called the Sadd el-Kafara, which in Arabic means "Dam of the Pagans”.
Furthermore, how do you build a dam?
To build a Dam the engineers must first de-water the part of the river valley in which they wish to place the dam. This is usually achieved by diverting the river through a tunnel. The tunnel is built through one side of the valley around the planned construction area. A series of holes is drilled in the rock.
Why a dam is built?
A dam is built to control water through placement of a blockage of earth, rock and/or concrete across a stream or river. Dams are usually constructed to store water in a reservoir, which is then used for a variety of applications such as irrigation and municipal water supplies.
When was the first dam built and why?
The first dam we know about for sure was built in 4000 BC across the Nile River in Egypt. It was construct ed to open a site for the building of the city of Memphis. Earth dams were turned out by the ancient Babylonians in large numbers as part of their master plan to irrigate land that was ordinarily without water.