Beneath America's cities and rural areas lies a complex network of pipelines, wires, conduits and cables. Some are buried only few feet - or less - below the surface. Hitting these lines can damage them, disrupting service, resulting in costly repairs and possibly fines and even endangering lives. A new, federally-mandated national "Call Before You Dig" number, 811 was created to help protect you from unintentionally hitting underground utility lines while working on digging projects.