PORTER 4D LLC, leads the infrastructure industry in providing technology, expertise, and demonstrated value with high accuracy mapping of underground pipelines and conduits. Our services span Oil & Gas, Electric T&D, Telecom, and Municipal systems. P4D provides results based on 35+ years of system research, development & commercialization of integrated navigation systems, field services, and GIS delivery platforms and process. The critical need for confidence of asset location accuracy is essential in all aspects of risk management, achieving operational excellence, and permit and regulatory compliance. This includes Subsurface Utility Engineering (SUE) practices for locating utilities in corridors and facilities, using these in-pipe systems, GPR, EM technologies for 3D imaging, and direct examination for confirmation and discrimination. The deliverable is confidence in asset location.