How to Build a Dam?

A dam can be built many ways. All a dam is, is the blocking of water by a manmade object in order to direct or change the flow of water. If you are wanting to create a dam, you will need to find means to build and obstruct the flow of water. You can do this with wood, like beavers, or you can make it with concrete and steel. It really depends on what you are wanting the dam for.