laws. The most famous of these was the 1809 duel between Henry Clay and Humphrey Marshall. There was an attempt to build a second town within Clarksville's boundaries, named Ohio Falls City, until the Indiana Supreme Court ruled that this would be illegal. The town was managed by a ten-member Board of Trustees in the charter from Virginia. The trustees were allowed to align lots along roads and sell the lots for the proceeds to benefit the town. The trustees could elect replacements as needed and did not have to reside in the town. This remained controversial with residents until 1889 when the board stopped meeting and was replaced by a three-member board. One member was selected by the Floyd County Commissioners, one by the Clark County Commissioners, and one by residents of Clarksville. Between 1889 and 1937, the town established a five-member board entirely elected by residents. The historic records related to this governmental change were lost in the Ohio River flood of 1937. The Great Flood of 1937 decimated the town. The entire town was submerged beneath as much as of water in some areas for over three weeks during January and February. With almost all of the old town destroyed, Clarksville was rebuilt with a new modern city plan. The post-World War II housing boom and new jobs brought growth to the city. The population increased from 2,400 in 1940 to 22,000 in 2000. The city has expanded to the north by annexing several sizable suburbs. By 1981 the State of Indiana changed statutes to convert the managing board of trustees to a council with members rather than trustees. In 1990 voters approved expansion of members of the Town Council from five to seven following the area growth. Clarksville is now the major shopping hub of Southern Indiana, with the hub area centered on Lewis and Clark Parkway and nearby Veterans Parkway. Geography Clarksville is located at (38.311885, -85.767265). According to the 2010 census, Clarksville has a total area of , of which (or 98.03%) is land and (or 1.97%) is water. Demographics 2010 census As of the census of 2010, there were 21,724 people, 9,175 households, and 5,464 families living in the town. The population density was . There were 9,839 housing units at an average density of . The racial makeup of the town was 85.1% White, 5.6% African American, 0.3% Native American, 0.7% Asian,