DD said:
 Quote:
Theo, with wood, seems like it would rot.
The wood frame will certainly rot; it's only purpose is to hold the rubber sheet in place until you get the clay compacted on both sides of the collar. Then the soil is supposed to hold the collar in place.

That's the theory. I'm certain the wood is gone now (soft pine after 4 years) and the dam does not leak at either pipe. But I'm not about to dig it up to check the collars. ;\)

bigfrog:

The collars we used were a standard item from the local discount drainage supply place, where we got our pipe and drain box.


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