First off, Welcome to the forum!!!
To answer the ditch pipe question, the water level will balance between the pond and the ditch level....If the water in the ditch is higher than your pond, it will flow into the pond, otherwise the water will flow out of your pond into the ditch. The pipe being undewater has nothing to do with it. One thing to consider when having the pipe under water in your pond is that fish can swim out of it as the levels balance and the flow slows.
I suspect with normal rain amounts in your area, a 10 acre watershed is adequate, but your local NRCS agent should be happy to let you know for sure. Having an extra,controlable water supply could never be a bad thing!
The pond ought to look great! What species of birds are the nesting houses for?
Last edited by Rainman; 09/04/09 11:13 PM.
