In September 2009, an even worse flood occurred due to a stalled weather system, and the training of heavy showers and thunderstorms over the area. On September 21, the creek rose even higher than in 2005, blocking not only Georgia 92, but also Interstate 575 at the southern end of the ramps to 92, and flooding the Towne Lake Parkway diamond interchange and underpass (and a gas station) beneath 575 one exit north. Traffic was detoured at Chastain Road (two exits south of 92), but it also flooded at the creek and was barricaded to all traffic to the east, making it very difficult to reach alternate routes.