On July 22, 2006, near Campbellsville, Kentucky, a Tennessee Gas Pipeline exploded. A 25-foot (7.6 m) chunk of pipe blew out of the ground and landed 200 feet (61 m) away, the pipe twisted and mangled, its external coating burned off. The 24" (610 mm) pipeline ruptured due to external corrosion more than two feet (60 cm) long at the bottom of a valley in an area of wet shale, known to cause corrosion on buried pipelines in this part of Kentucky.