Dams are the obstructions of crossway of water flowing and hold up the water. Dams sometimes refer to the reservoir which is the tank or the poll that can hold water. Dams are usually built by making a big bank that blocks an existing channel. These banks play a role by reducing the release of overflow of water down the stream of the dams. Some dams have a mall opening pipes that reduce the volume of water that can exit the dam. Dams play crucial role by supplying the community and providing the irrigation schemes with water.