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<br />Desert Basketmaker and Pueblo cultures of the Southwest. <br />in the form of campsites, chipping sites and petroglyphs <br />found within the proposed wilderness area. <br /> <br />Evidence <br />has been <br /> <br />The first recorded exploration of any part of the Green River Basin <br />by European man was made by a party under the leadership of Franciscan <br />friars Francisco Domingues and Francisco de Escalante in 1776. Later <br />explorations occurred including John Wesley Powell's famous journeys <br />of 1869 and 1871 down through the canyons. <br /> <br />. <br /> <br />The first permanent settlement in the vicinity of the proposed wilder- <br />ness area was in Browns Park in 1854. Remnants of ranching operations <br />may still be found in places like Castle Park, Pool Creek Canyon, <br />Island Park and Zenobia Basin. <br /> <br />The original Dinosaur National Monument, established by Presidential <br />Proclamation on October 4, 1915, set aside 80 acres for the preserva- <br />tion of an "extraordinary deposit of Dinosaurian and other gigantic <br />reptilian remains of the Jurassic period." Twenty-three years later, <br />in 1938, the monument was enlarged by Presidential Proclamation to <br />include the canyons of the Green and Yampa Rivers. The purpose of <br />this action was to preserve "various objects of historic and scienti- <br />fic interest". <br /> <br />Archeological investigations have been made under contract with the <br />pniversity of Colorado. A comprehensive archeological survey of the <br />entire park, however, has not been completed. An inventory of known <br />studies is being evaluated and further studies will be programmed as <br />funding evaluation will be made and those sites which qualify will <br />be nominated to the National Register of Historic Places. <br /> <br />Historical investigations also indicate that no significant historic <br />sites are found within the proposed wilderness, with the exception <br />of an historic trail. No property in the proposed wilderness area is <br />on the National Register of Historic Places, and none have been proposed. <br /> <br />C. Changes in the Environment of the Proposed Wilderness <br /> <br />The natural Environment of the Proposed Wilderness has been modified <br />most by the following external human agents: (1) Construction of <br />Flaming Gorge Dam, and (2) grazing in areas adjacent to the wilderness. <br />Further dams on main streams inside or upstream from the monument <br />would have a pronounced effect on the scenic appearance, recreation <br />and wildlife of the wilderness. Grazing and limited, selecHve <br />predator control will be el~1nated from monument lands adjacent to <br />the wilderness beginning in 1985, but these practices outside the <br />monument will always influence the wildlife and vegetative cover to <br />some extent. <br /> <br />20 <br />