Spray painted lines, cryptic word abbreviations, number codes and strange symbols. Initially, you think it might be graffiti – but as you get closer you realize that it has something to do with construction. Before digging at a particular job site the street surface is marked by a professional who can detect the network of utility lines, cables and pipes that exist below grade. Using the chart below, you can begin to decipher where the dig will actually occur and the different utility paths ready to be exposed.
