National Monuments Modified by Woodrow Wilson via the Antiquities Act:
March 4, 1913, to March 3, 1921
Mount Olympus, WA, Proclamation No. 1293, 39 Stat. 1726 (May 11, 1915)
Reduced area: “modified . . . as shown on the diagram forming a part hereof,” which displays the change to the area via the township and range system.
(NPS Antiquities Act Centennial lists the Mount Olympus “Acres Affected” as “313,280.”)
Natural Bridges, UT, Proclamation No. 1323, 39 Stat. 1764 (February 11, 1916)
Confirmed boundaries, thus neither added nor excluded any area, rather, “WHEREAS, the three several tracts embraced within this monument reservation have been resurveyed and relocated with reference to the recently established corner of the public land surveys, to the end that their location has been definitely fixed.”
El Morro, NM, Proclamation No. 1377, 40 Stat. 1673 (June 18, 1917)
Added lands surrounding the existing monument, thus enlarging the monument to “240 acres” (from diagram), which included the original monument area of 160 acres.
Zion, UT, Proclamation No. 1435, 40 Stat. 1760 (March 18, 1918)
Added lands adjoining the existing Mukuntuweap National Monument, thus enlarging the monument to “approximately 120 sq. miles or 76,800 acres” (from diagram), which included the original monument area.
Changed name: This proclamation includes text that officially changed the name to “Zion National Monument.”
Gran Quivira, NM, Proclamation No. 1545, 41 Stat. 1778 (November 25, 1919)
Expanded the existing monument so that “the boundaries of said national monument are now as shown on the diagram hereto annexed,” which the diagram displays using the township and range system.
No acreage listed in the text or on the diagram. The original monument was 160 acres.
(NPS Antiquities Act Centennial lists the Gran Quivira “Acres Affected” as “240.”)
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