Why not simply dig a trench in your yard heading away from the pond, fill it with crushed stone for drainage, and then just burry your pipe?
Water should seep into the ground, and any excess that runs off will go out to the street and appear as natural runoff.
Should also hide the mucky stink that PO'ED someone. Most likely the 80 yr. old widower living alone across the way from you, that hates pools and children.
The more you think know, the less you learn.
MIKE S.
DISCLOSE THIS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!