 The per capita income for the city was $17,071.About 9.9% of families and 12.8% of the population were below the poverty line, including 16.7% of those under age 18 and 8.1% of those age 65 or over.Construction of a primary water detention cell for flood control by the Central Platte River Natural Resources District, the city of Grand Island, Hall County, and Merrick County has been delayed by the slow cleanup of burning grounds with buried and unexploded gravel mines on the grounds of the former Cornhusker Army Ammunition Plant.