Nkwupụta ikike a ejighi ọzọ ruo mgbe 1996, mgbe Onye isi ala Bill Clinton kwupụtara Nnukwu Ụzọ-Escalante National Monument na Utah. Omume a bụ ihe a na-achọghị na Utah, na ụgwọ ndị e webatara iji gbochie ikike nke onye isi ala., nke ọ bụla n'ime ha emebeghị. Ihe ka ọtụtụ n'ime ihe ncheta mba 16 nke Onye isi ala Clinton kere abụghị nke National Park Service, kama ọ bụ Bureau of Land Management dị ka akụkụ nke National Landscape Conservation System. Ndị isi ala ejirila ikike nkwupụta nke Antiquities Act ọ bụghị naanị iji mepụta ihe ncheta mba ọhụrụ kama iji gbasaa ndị dị ugbu a. Dịka ọmụmaatụ, D. Franklin Roosevelt gbasaa Dinosaur National Monument na 1938.
Utah