However , as human visitors increases the management of Yellowstone Park was faced with the problem of preserving the natural geologic features in the Park as humans intentionally or unintentionally assaulted them . To address the problem President Woodrow Wilson signed into existence a new government agency , the National Park Service , which was assigned to a task of wildlife and natural preservation (Haines 64 . b . After it was founded the Yellowstone Park had undergone two major expansion . In 1929 the east boundary...