Tribal Chairman Mark Fox said they could use it to build anything from a tribally operated casino to a parking lot. The Three Affiliated Tribes, an oil-producing tribe in North Dakota comprised by The Mandan, Hidatsa and Arikara Nation, has recently acquired satellite property just off the central casino-lined corridor of Las Vegas on empty 8.7 acres for $12 million. With nearby casinos and sports venues returning to 100% capacity, another possibility would be building a parking lot. The Three Affiliated Tribes, an oil-producing organization, is currently discussing potential uses for the empty 8.7 acres it recently bought for $12 million just off the south end of the Vegas strip.