The Louisville sewer explosions were a series of explosions that destroyed more than two miles (3 km) of streets in Louisville, Kentucky, United States on February 13, 1981. The blasts were caused by the ignition of hexane vapors which had been illegally discharged from a Ralston-Purina soybean processing plant located near the University of Louisville. The plant, located on Floyd Street, was long recognizable for its large, landmark silos, visible from Eastern Parkway and Interstate 65 until the site's demolition in 2014.

• http://en.wikipedia.org/wiki/Louisville sewer explosions