Tyler Ludens wrote:I agree with Brenda, I think having a permanent water holding terrace or giant swale on the side of a hill is just asking for a landslide. Unless it is a very gentle hill, there's no way to make a proper dam with a "key" on the side of a hill. You can't just pile up dirt on the downhill side and expect it to hold water, and if the dam isn't keyed into the subsoil or bedrock, the dam will leak or slide.
See "Water for Every Farm" by PA Yeomans for lots of information about making dams and other water managing strategies.
The contour dam is a shallow dam with a large surface area. It will be a
very, very cheap dam. For the amount of Earth moved, we are going to get a lot
Contour dams are very cheap, no-fuss dams. They are dams in which the
actual dam follows the contour and then swings back to ground level.
Basically, the construction is the same as for other dams, but usually you
put contour dams on pretty flat land, and you grade them up pretty quickly.
They may be six feet high. It doesn’t matter if you get a bit of grass or rock in
them sometimes. They can be a little rougher. Just roll them down tightly and
they will hold.
tim rew wrote:
is there any particular reason that a very long dam like this couldn't have a core trench the entire length of it, if necessary?