[PAR] [TLE] Gateway Arch [SEP] The Gateway Arch is a 630 ft monument in St. Louis in the U.S. state of Missouri.  Clad in stainless steel and built in the form of an inverted, weighted catenary arch, it is the world's tallest arch, the tallest man-made monument in the Western Hemisphere, and Missouri's tallest accessible building.  Built as a monument to the westward expansion of the United States, and officially dedicated to "the American people," it is the centerpiece of the Jefferson National Expansion Memorial and has become an internationally recognized symbol of St. Louis, as well as a popular tourist destination. [PAR] [TLE] Chouteau Island [SEP] Chouteau Island ( ), situated approximately 8 mi due north of the Gateway Arch in St. Louis, Missouri, and approximately 1 mi south of the confluence of the Missouri River and Mississippi River, is one of a cluster of three islands: Chouteau Island, Gabaret Island, and Mosenthein Island.  The three, with a combined area of approximately 5500 acre , are located in Madison County, Illinois.  The three-island complex is also referred to as "Chouteau Island".  The island is manmade, having been created during the construction of the Chain of Rocks Canal between 1946 and 1953.  Most of Chouteau Island lies in Chouteau Township, but its southern quarter lies in Venice Township, both in Madison County.  Gabaret Island and Mosenthein Island both lie entirely in Venice Township.
[PAR] [TLE] Gateway Arch [ SEP ] The Gateway Arch is a 630 ft monument in St. Louis in the U.S. state of Missouri . Clad in stainless steel and built in the form of an inverted , weighted catenary arch , it is the world 's tallest arch , the tallest man - made monument in the Western Hemisphere , and Missouri 's tallest accessible building . Built as a monument to the westward expansion of the United States , and officially dedicated to " the American people , " it is the centerpiece of the Jefferson National Expansion Memorial and has become an internationally recognized symbol of St. Louis , as well as a popular tourist destination . [PAR] [TLE] Chouteau Island [ SEP ] Chouteau Island ( ) , situated approximately 8 mi due north of the Gateway Arch in St. Louis , Missouri , and approximately 1 mi south of the confluence of the Missouri River and Mississippi River , is one of a cluster of three islands : Chouteau Island , Gabaret Island , and Mosenthein Island . The three , with a combined area of approximately 5500 acre , are located in Madison County , Illinois . The three - island complex is also referred to as " Chouteau Island " . The island is manmade , having been created during the construction of the Chain of Rocks Canal between 1946 and 1953 . Most of Chouteau Island lies in Chouteau Township , but its southern quarter lies in Venice Township , both in Madison County . Gabaret Island and Mosenthein Island both lie entirely in Venice Township .
Chouteau Island and Gateway Arch can both be found having at least half of their area in what state?
Chouteau Island and Gateway Arch can both be found having at least half of their area in what state ?
Missouri
Missouri