Not quite sure how to do things in the state of Michigan, but in California, private pond is defined as detaching waterbody (from the waters of the U.S.), on privately owned property, with no inherent discharge of the privately owned waterbody during annual rainfall, and does not locate on property that considered as easement, subjected under jurisdiction of municipality.
Good job in collecting information so far. Just like California, you can grow tilapia in isolated pond/lake, but the waterbody must not be drained to, spill out of, or connected hydrologically to any water of the state or U.S.. This includes and not limited to streams, rivers, lakes, ocean, washes, riparian habitats, deltas, and even basins designed as infiltration and/or sedimentary retention.
