<Table> <Tr> <Th_colspan="2"> Des Moines, Iowa </Th> </Tr> <Tr> <Td_colspan="2"> State Capital </Td> </Tr> <Tr> <Td_colspan="2"> City of Des Moines </Td> </Tr> <Tr> <Td_colspan="2"> Clockwise from top: skyline, the Greater Des Moines Botanical Garden, the Kruidenier Trail bridge, the Iowa State Capitol, and 801 Grand (Principal Financial Group) </Td> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> Flag </Td> <Td> Logo </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td_colspan="2"> Nickname (s): "Hartford of the West" </Td> </Tr> <Tr> <Td_colspan="2"> Location of Des Moines, Iowa in Polk County . </Td> </Tr> <Tr> <Td_colspan="2"> Des Moines, Iowa Des Moines, Iowa Des Moines, Iowa Show map of Iowa Show map of the US Show map of North America Show all Location in Iowa, United States & North America </Td> </Tr> <Tr> <Td_colspan="2"> Coordinates: 41 ° 35 ′ 27" N 93 ° 37 ′ 15" W ﻿ / ﻿ 41.59083 ° N 93.62083 ° W ﻿ / 41.59083; - 93.62083 </Td> </Tr> <Tr> <Th> Country </Th> <Td> United States </Td> </Tr> <Tr> <Th> State </Th> <Td> Iowa </Td> </Tr> <Tr> <Th> Counties </Th> <Td> Polk, Warren </Td> </Tr> <Tr> <Th> Founded </Th> <Td> 1843 </Td> </Tr> <Tr> <Th> Incorporated </Th> <Td> September 22, 1851 </Td> </Tr> <Tr> <Th_colspan="2"> Government </Th> </Tr> <Tr> <Th> Type </Th> <Td> Council--manager government </Td> </Tr> <Tr> <Th> Mayor </Th> <Td> Frank Cownie (D) </Td> </Tr> <Tr> <Th> Senate </Th> <Td> Senate list (show) <Ul> <Li> Matt McCoy (D) </Li> <Li> Bradford Zaun (R) </Li> <Li> Jack Hatch (D) </Li> <Li> Richard Dearden (D) </Li> <Li> Larry Noble (R) </Li> </Ul> </Td> </Tr> <Tr> <Th> House </Th> <Td> House list (show) <Ul> <Li> Jo Oldson (D) </Li> <Li> Bruce Hunter (D) </Li> <Li> Janet Petersen (D) </Li> <Li> Wayne Ford (D) </Li> <Li> Ako Abdul - Samad (D) </Li> <Li> Kevin McCarthy (D) </Li> <Li> Rick Olson (D) </Li> <Li> Walt Tomenga (R) </Li> </Ul> </Td> </Tr> <Tr> <Th> U.S. Congress </Th> <Td> David Young (R) </Td> </Tr> <Tr> <Th_colspan="2"> Area </Th> </Tr> <Tr> <Th> State Capital </Th> <Td> 90.65 sq mi (213.93 km) </Td> </Tr> <Tr> <Th> Land </Th> <Td> 88.92 sq mi (233.3 km) </Td> </Tr> <Tr> <Th> Water </Th> <Td> 1.73 sq mi (4.48 km) </Td> </Tr> <Tr> <Th> Elevation </Th> <Td> 955 ft (291 m) </Td> </Tr> <Tr> <Th_colspan="2"> Population (2010) </Th> </Tr> <Tr> <Th> State Capital </Th> <Td> 203,433 </Td> </Tr> <Tr> <Th> Estimate (2016) </Th> <Td> 215,472 </Td> </Tr> <Tr> <Th> Rank </Th> <Td> 1st in Iowa 102nd in US </Td> </Tr> <Tr> <Th> Density </Th> <Td> 2,533 / sq mi (978.0 / km) </Td> </Tr> <Tr> <Th> Metro </Th> <Td> 634,725 (89th) </Td> </Tr> <Tr> <Th> Time zone </Th> <Td> CST (UTC - 6) </Td> </Tr> <Tr> <Th> Summer (DST) </Th> <Td> CDT (UTC - 5) </Td> </Tr> <Tr> <Th> ZIP codes </Th> <Td> 50301 - 50340 - 50310 </Td> </Tr> <Tr> <Th> Area code </Th> <Td> 515 </Td> </Tr> <Tr> <Th> FIPS code </Th> <Td> 19 - 21000 </Td> </Tr> <Tr> <Th> GNIS feature ID </Th> <Td> 0465961 </Td> </Tr> <Tr> <Th> Website </Th> <Td> www.dmgov.org </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Des Moines, Iowa </Th> </Tr>

When did des moines became the capital of iowa
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