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Lewiston, Nez Perce County, Idaho, 83501, United States (46.41959 -117.02161)
According to the U.S. Census Bureau, the city has a total area of 18.04 square miles (46.72 km2), of which 17.23 square miles (44.63 km2) is land and 0.81 square miles (2.10 km2) is water. Downtown Lewiston, at 756 feet (230 m), is only slightly higher in elevation than the river, about 740 ft (226 m), which was thirty feet (9 m) lower prior to the completion of the dam. Away from downtown the terrain gains elevation quickly.