There's no pictures of dirt piling up anywhere on that site that I know of. The Wilderness project had its own dirt piling location elsewhere.If I had to guess as to what they are doing I'd think they are storing dirt there from the fort wilderness DVC expansion. Doing this obviously stores the dirt but it also helps compress the ground in preparation for future projects. We saw this process happen with the StarWars themed hotel project. Since there's no reported permits, I can't imagine this is anything more than that.