Pond Boss Forums POND CONSTRUCTION Building a dam How do you build a dam with a flowing creek?

What Tony said. If you can redo the dam, divert the water around the area. Coffer dams are temp dams to allow you to work in a previously wet area. Once the work is completed, the coffer dam is removed to let the actual dam do it's job.

Interlocking steel pieces that look like the letter W are used, and pounded down into the dirt. A vibratory puller is used to remove them.