The first modern day log flume amusement ride constructed by Arrow was "El Aserradero" at Six Flags Over Texas in Arlington, Texas, which opened in 1963 and is still in operation. The Mill Race, Arrow Log Flume number two, opened just a few weeks later at Cedar Point. Log flumes proved to be extremely popular and quickly became staples at amusement and theme parks throughout the world. The ride was so popular that some parks started adding second flume rides to help reduce the long lines. Cedar Point added Shoot the Rapids in 1967, and Six Flags Over Texas and Six Flags Over Georgia both added second flumes in 1968. When Six Flags Over Mid America opened in 1971, it featured twin flumes.