Welcome to Surveywerks, PLLC. North Carolina’s leading accredited subsurface utility contractor. Underground utilities are as important as they are dangerous. That’s why it’s important to always call 811 before you dig. After 811 comes out, that’s where we come in. Check out our list of services below. Whether its ground penetrating radar, pipe cleaning or video pipe inspection, we have a passion for problem solving. When you want to understand what's underneath, call RDU Pipe. Pipe Cleaning Video Pipe Inspection Utility Locating Electromagnetic Induction Concrete Scanning Hydro Excavation