Thanks for the ideas, Worse case scenario I think I will dig a trench and run the tile into a catch basin and then pump the water into the pond, (I don't like standing water in the pastures and hay field after a rain).

I would rather figure out a way to drain the tiles directly into the pond, I was thinking maybe a 90 degree elbow down and a vertical check valve, would this give the drain tile enough pressure to work against the head pressure of the pond?

Or would the above work with a trap after the elbow?

Mike