2) Next, you must find the stones needed for you dam. The most effective way to format your dam is the following:
-A foundation of medium and small sized stones and rocks is needed as a base
-Then, you must place the largest rocks along the outside edges of the base in order to take the heavy damage from the fast flowing water
- Lastly, the outside of the erosive area or creek bed must be filled with stones in order to keep the erosion from increasing even more
3) The dam should be set at a slight arc. The stone walls closest to parallel to the flowing water, or the arms should be close to parallel to the running water. These arms are unnecessary in smaller projects, preventing erosion
4) These "arms" of the dam should be lower than the rest of the dam, so you should dig a small trench in the creek bed and fill these indentions with smaller pebbles and gravel until they are as high as the rest of dam. Like I said before, though, these arms are unnecessary to smaller erosion projects
5) Even outside of the arms, though, larger stones should put a "liner" on the creek bed's walls. Below these, though, it is necessary to place smaller stones in order to increase the siltation of the area
6) Repeat the process every several feet (depending on the creek bed) in order to slow the erosion and water down even more
Although this process is very exact, it is less so when building small one rock dam, where water does not flow as rapidly or as frequently. In these situations, it is just necessary to make sure that you make a dam one rock tall, but many long. This process is solely used for larger creek beds
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