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

A=πr^2

(area = pi times radius squared)

Do the math.

What's cheaper, four 6" pipes or one 12" pipe? That's what you'd need to get the same cross section......... (unless I did the math wrong)

You sure you're looking at double walled culvert?

Go to a plumbing contractors supply house - you most likely will beat the big box store prices......

I come up with a 12" elbow for around $67.00.
http://www.alantlynninc.com/Culvert.html