I was wondering about that happening. What's the best way to have outflow in a dam when you have a spring parts of the winter flowing into a pond. As long as the spring keeps flowing I am sure it would flow out of a stand pipe but most of the time they stop periodacly and then it would freeze around stand pipe. I am starting to lean towards having a cement overflow on the dam and no pipe.

"I think I have a nibble" Homer Simpson

34ac natural lake