Question: What town was evacuated in 1940-1941 and take over by the U.S. Government to create Weldon Spring Ordnance Works, a 17323 acre facility?
Context: Weldon Springs State Park is a 550 acre state park located near Clinton, Illinois.  It centers on Salt Creek and the impoundment of a tributary, Weldon Springs, to form Weldon Spring Lake, a reservoir.  It is supervised by the Illinois Department of Natural Resources. The P-9 Project was the codename given during World War II to the Manhattan Project's heavy water production program.  The Cominco plant at Trail, British Columbia, was upgraded to produce heavy water.  DuPont built three plants in the United States: at the Morgantown Ordnance Works, near Morgantown, West Virginia; at the Wabash River Ordnance Works, near Dana and Newport, Indiana; and at the Alabama Ordnance Works, near Childersburg and Sylacauga, Alabama.  The American plants operated from 1943 until 1945.  The Canadian plant at Trail continued in operation until 1956.  Three nuclear reactors were built using the heavy water produced by the P-9 Project: Chicago Pile 3 at Argonne, and ZEEP and NRX at the Chalk River Laboratories in Canada. Joliet Army Ammunition Plant (JOAAP, formerly known as the Joliet Arsenal) was a United States Army arsenal located in Will County, Illinois, near Elwood, Illinois, south of Joliet, Illinois.  Opened in 1940 during World War II, the facility consisted of the Elwood Ordnance Plant (EOP) and the Kankakee Ordnance Works (KNK).  In 1945, the two were deactivated and combined forming the Joliet Arsenal.  The plant was reactivated for the Korean War and renamed Joliet Army Ammunition Plant during the Vietnam War.  Production of TNT ended in 1976, and the major plant operations closed shortly after in the late 1970s.  The facility briefly revived an automated load-assemble-pack (LAP) artillery shell operation that was managed by the Honeywell Corporation during the Reagan administration in the 1980s before it was finally closed. Weldon Spring Ordnance Works (WSOW) was a 17323 acre U.S. Government-owned, contractor-operated (GOCO) facility in St. Charles County, Missouri, 55 km west of St. Louis.  The site was originally operated by the Atlas Powder Company during World War II from 1941 to 1945 to produce explosives.  The Atomic Energy Commission acquired part of the property in 1955, and Mallinckrodt, Inc. processed uranium ore from 1957 to 1966 under contract.  The site has been divided into several parcels, and ownership has transferred over the years.  Two portions of the original WSOW property are now Superfund sites that require substantial cleanup efforts.  The environmental remediation of the WSOW site is currently designated as a major project of the Defense Environmental Restoration Program of the United States Department of Defense.  Part of the original property is still used by the Army Reserve as the Weldon Spring Training Area. MidAmerica Industrial Park is Oklahoma's largest industrial park.  The park is located in Pryor Creek, Oklahoma.  Over 70 firms are located within the industrial park including operations of seven Fortune 500 companies.  The park was founded in 1960, when the Federal government sold most of the former Oklahoma Ordnance Works to a public trust, the Oklahoma Ordnance Works Authority.  It covers 9,000 acres (36 km²). The Oklahoma Ordnance Works (OOW) was a government-owned, contractor-operated (GOCO) facility that was built in Mayes County, Oklahoma to produce smokeless powder and other military explosives that were to be used during World War II.  The facility was closed from 1946 until 1954, when production resumed until 1956, then closed again.  In 1960, it was sold to the Oklahoma Ordnance Works Authority (OOWA), which converted most of the facility to become the mid America Industrial Park. Weldon Springs is a spring at the town of Weldon Spring, in the U.S. state of Missouri. Maumelle Ordnance Works Locomotive 1 is a gasoline-powered, mechanically driven, two-axle railway locomotive which was built in 1942 by Vulcan Iron Works (of Wilkes-Barre, Pennsylvania) for the United States War Department's Maumelle Ordnance Works.  It was added to the U.S. National Register of Historic Places in 2006 and is preserved at the Fort Smith Trolley Museum. Francis Howell High School is a four-year public high school located in Weldon Spring, Missouri.  Approximately 1800 students from Defiance, Foristell, New Melle, O'Fallon, Saint Peters, Saint Charles, Weldon Spring, and Wentzville attend school at Howell.  It is in the Francis Howell School District. Hamburg was a small town in St. Charles County, Missouri, United States.  The town was evacuated in 1940-1941 as the area was taken over by the U.S. Department of the Army for the Weldon Spring Ordnance Works, which manufactured trinitrotoluene (TNT) and dinitrotoluene (DNT) and later processed uranium.
Answer: Hamburg