They wanted to stock it with fish, so they could fish, too. Many parties have been had on the banks and the wharf (you don’t see it in the shot, but there is a gazebo, and an aerator/fountain). This girl used to train youngsters to ride, and that included riding through water on horseback. 
Discussion
Got it, it's intended to make money as a water feature, not be a pond
Define pond. We have a pond which serves the bees as a water source, and was stocked with bream (before all the blue herons and eagles fished it up). Now, an alligator has made his home there. I mean, my friend’s pond looks nice, parties have been hosted on it, the horses cool off and drink from it, we swim in it, fish in it, kids can learn to ride through it, and the dogs have a water source. Multi-functional.
My ponds are the same, but I don't let livestock in it. That's my point, letting livestock in the pond and in riparian ares for more than a couple days a year to clean up is detrimental to the pond and riparian zone and will lead to the destruction of the pond over time. I can send you pictures of my neighbors ponds that aren't fenced off VS mine and show you what I mean if you want.