Pond Boss Forums POND CONSTRUCTION Building a dam Filling in an old washed out Dam

It may sound like a lot of work, but if you don't calculate how much watershed you have, and use that number to figure out how many gallons of water the creek will see from a significant rainstorm, your dam and pipe might get washed downstream again if the pipe isn't large enough.

Just saying.............

I've used black corrugated double wall "culvert", and put a 90° elbow on it, then extended the vertical pipe to the height that I needed, cutting it with a recip saw.

I'm thinking that 6" is way too small.......................

You can do it cheap and it might hold, or you may have to re-spend the money because it failed. I usually opt to do it once, no matter what it costs because I don't want to have to do it again.