When in doubt about what to do next make the most traveled roads straighter. In Trump's case the Mississippi River watershed might become the busiest trade route in the US. As a real estate man he should be the potential tor places like the Bundy Ranch of today to the wheat fields of Kansas, same only two harvests per year.
Might I suggest some peat moss from Canada to speed up the black dirt thingy. Sort of looks like the spillways after the water stopped, except longer period of time. 2 extra points if you get the direction of flow right. Tires strung together is the first step in stopping flash floods and the erosion that comes with it