Question: When did the state where Motley Slough Bridge is located become part of the US?

full_context: Document 1: Mississippi: In April 1699, French colonists established the first European settlement at Fort Maurepas (also known as Old Biloxi), built in the vicinity of present - day Ocean Springs on the Gulf Coast. It was settled by Pierre Le Moyne d'Iberville. In 1716, the French founded Natchez on the Mississippi River (as Fort Rosalie); it became the dominant town and trading post of the area. The French called the greater territory ``New France ''; the Spanish continued to claim part of the Gulf coast area (east of Mobile Bay) of present - day southern Alabama, in addition to the entire area of present - day Florida.
Document 2: Minnesota: In 1762 the region became part of Spanish Louisiana until 1802. The portion of the state east of the Mississippi River became part of the United States at the end of the American Revolutionary War, when the Second Treaty of Paris was signed. Land west of the Mississippi River was acquired with the Louisiana Purchase, although a portion of the Red River Valley was disputed until the Treaty of 1818. By the late 1700s, the North West Company had established the post of Fort Charlotte at the Lake Superior end of the Grand Portage, until moving 50 miles northeast to Fort William in 1803. In 1805, Zebulon Pike bargained with Native Americans to acquire land at the confluence of the Minnesota and Mississippi rivers. The construction of Fort Snelling followed between 1819 and 1825. Its soldiers built a grist mill and a sawmill at Saint Anthony Falls, the first of the water-powered industries around which the city of Minneapolis later grew. Meanwhile, squatters, government officials, and tourists had settled near the fort. In 1839, the army forced them to move downriver and they settled in the area that became St. Paul. Minnesota Territory was formed on March 3, 1849. The first territorial legislature (held September 2, 1849) was dominated by men from New England or of New England ancestry. Thousands of people had come to build farms and cut timber, and Minnesota became the 32nd U.S. state on May 11, 1858. The founding population was so overwhelmingly of New England origins that the state was dubbed "the New England of the West".
Document 3: History of Mississippi: In 1817 elected delegates wrote a constitution and applied to Congress for statehood. On Dec. 10, 1817, the western portion of Mississippi Territory became the State of Mississippi, the 20th state of the Union. Natchez, long established as a major river port, was the first state capital. As more population came into the state and future growth was anticipated, in 1822 the capital was moved to the more central location of Jackson.
Document 4: Mark Morris Memorial Bridge: The Mark Morris Memorial Bridge (locally called the North Bridge) is a 2 lane truss bridge across the Mississippi River in the United States. It connects the cities of Clinton, Iowa and Fulton, Illinois. The bridge may also be known as the Lyons-Fulton Bridge, which was the name of a predecessor bridge and the name listed on the USGS topographical map. The town of Lyons, Iowa, was annexed to Clinton in 1895, but the north end of the city is still referred to as Lyons. The bridge is the terminus of both Iowa Highway 136 and Illinois Route 136. The 1975 bridge was named in memory Mark Morris, a long time member of the City of Clinton Bridge Commission who died in 1972. Morris was instrumental in the construction of the 1975 bridge and the City of Clinton Bridge Commission named it in his honor.
Document 5: Alden Bridge: The Alden Bridge is a historic bridge in Alden, Iowa, which carries the town's Main Street over the Iowa River. The concrete bridge is long and consists of two spans. It was built in 1936 to replace an earlier wooden bridge that had begun to deteriorate. The Weldon Brothers Construction Co. supervised the bridge's construction, while the Iowa State Highway Commission designed the structure; it was one of the first bridges designed by the ISHC, which used similar plans for many other bridges in the state. Labor for the construction effort came from the Works Progress Administration, providing jobs for many of Hardin County's unemployed residents. The bridge was dedicated on July 4, 1936, as part of Alden's Independence Day celebrations.
Document 6: DeSoto Bridge: DeSoto Bridge was a trussed deck-arch bridge that spanned the Mississippi River in St. Cloud, Minnesota. It was built in 1958 by the Minnesota Department of Transportation. The bridge was painted black, which is typical for railroad bridges but unusual for a highway bridge. The river banks on either side are relatively high, so the bridge required deep trusses which arched over the river.
Document 7: Sabula Rail Bridge: The Sabula Rail Bridge is a swing bridge that carries a single rail line across the Mississippi River between the island town of Sabula, Iowa and Savanna, Illinois. Originally built for the Milwaukee Road, and subsequently owned by the Iowa, Chicago and Eastern Railroad, the bridge is operational and is currently owned by Canadian Pacific Railway.
Document 8: Mississippi: Mississippi ( (listen)) is a state located in the southeastern region of the United States. Mississippi is the 32nd largest and 34th-most populous of the 50 United States. Mississippi is bordered to north by Tennessee, to the east by Alabama, to the south by the Gulf of Mexico, to the southwest by Louisiana, and to the northwest by Arkansas.  Mississippi's western boundary is largely defined by the Mississippi River.  Jackson is both the state's capital and largest city.  Greater Jackson, with an estimated population of 580,166 in 2018, is the most populous metropolitan area in Mississippi and the 95th-most populous in the United States.
Document 9: Mississippi House of Representatives: The Mississippi House of Representatives is the lower house of the Mississippi Legislature, the lawmaking body of the US state of Mississippi. According to the state constitution of 1890, it is to comprise no more than 122 members elected for four-year terms. To qualify as a member of the house candidates must be at least 21 years old, a resident of Mississippi for at least four years, and a resident in the district in which he or she is running for at least two years. Current state law provides for the maximum number of members. Elections are held the first Tuesday after the first Monday in November.
Document 10: Indiana: In order to decrease the threat of Indian raids following the Battle of Tippecanoe, Corydon, a town in the far southern part of Indiana, was named the second capital of the Indiana Territory in May 1813. Two years later, a petition for statehood was approved by the territorial general assembly and sent to Congress. An Enabling Act was passed to provide an election of delegates to write a constitution for Indiana. On June 10, 1816, delegates assembled at Corydon to write the constitution, which was completed in 19 days. President James Madison approved Indiana's admission into the union as the nineteenth state on December 11, 1816. In 1825, the state capital was moved from Corydon to Indianapolis.
Document 11: Constitution of Missouri: The first constitution was written in 1820 in only 38 days. The Missouri Constitutional Convention (1861 - 63) was elected to decide on secession, and made no changes to the constitution.
Document 12: Fort Madison Toll Bridge: The Fort Madison Toll Bridge (also known as the Santa Fe Swing Span Bridge for the old Santa Fe rail line) is a tolled, swinging truss bridge over the Mississippi River that connects Fort Madison, Iowa, and unincorporated Niota, Illinois. Rail traffic occupies the lower deck of the bridge, while two lanes of road traffic occupy the upper deck. The double-decker bridge, which is about a mile long with a swing span of , was the longest and largest double-deck swing-span bridge in the world at the time it was built. Completed in 1927, it replaced an inadequate combination roadway/single-track bridge completed in 1887. The main river crossing consists of four Baltimore through truss spans and a swing span made of two equal arms, long. In 1999, it was listed in the National Register of Historic Places under the title, Fort Madison Bridge, ID number 99001035. It was also documented by the Library of Congress Historic American Engineering Record, survey number HAER IA-62. Construction and photographic details were recorded at the time in "Scientific American" magazine.
Document 13: Bridge in East Fallowfield Township (Mortonville, Pennsylvania): The Mortonville Bridge and Mill Race Bridge are stone arch bridges carrying Strasburg Road across the West Branch Brandywine Creek and an abandoned millrace at Mortonville, Pennsylvania. The Mortonville Bridge was placed on the National Register of Historic Places on September 18, 1985, while the Mill Race Bridge was added as the Bridge in East Fallowfield Township on June 22, 1988. The Mortonville Bridge was removed from the Register on July 16, 2010, following reconstruction; the Mill Race Bridge remains registered.
Document 14: Constitution of Florida: Florida's first constitution as a U.S. territory was written and implemented in 1838. On March 3, 1845, Florida was granted admission into the Union as the 27th state. The current Constitution of Florida was ratified on November 5, 1968, and has been modified by initiative and referendum several times since.
Document 15: Motley Slough Bridge: Motley Slough Bridge is a small bridge designated a Mississippi Landmark and on the U.S. National Register of Historic Places, located in Lowndes County, Mississippi. It is a single span iron Pratt pony truss bridge built in 1920. It "embodies the distinctive characteristics of a type, period or method of construction.".
ground_truth: Dec. 10, 1817
sub_queries: Which state is Motley Slough Bridge located? Answer: Mississippi
when did Mississippi become part of the united states Answer: Dec. 10, 1817