I'm in SW VA in the Blacksburg area. The water source is a spring. It runs about 10-15gpm (I'm guessing here based on a garden hose being about 6gpm) year round without rain. I can tell you the 3 inch over flow pipe works about at capacity when it isn't raining. When it rains hard I get at least double the flow. I am worried about freezing as well. I received advice not to worry about it but am hesitant.
