Abstract
Utility strikes are a major risk when performing underground excavation activities. According to the Common Ground Alliance (CGA), utility hits have resulted in over $1.7 billion in property damage, close to 2,000 injuries, and over 400 deaths over the past 20 years. Even with the diligent efforts of the State One Call systems, the reality is that many undocumented underground utilities are present throughout the nation. As we continue to adopt trenchless construction methods such as horizontal directional drilling (HDD) in urban environments, there needs to be technological advancements to reduce the risk of utility strikes. One of the major trending technologies in the 21st century, augmented reality (AR), integrates 3D models and the real world, intersecting virtual reality with reality. In the vertical construction industry, AR has already proven its value. During an HDD operation, there is a risk of striking an existing underground utility. However, by integrating AR during an HDD project, the operator's awareness of underground utilities is significantly increased. Greater awareness of existing utilities can significantly reduce potential damage and costly litigation. This paper demonstrates the innovation of augmented reality for trenchless technology projects. A pilot project was conducted in Phoenix, Arizona, to demonstrate the application of AR with HDD and show the inherent risk reduction benefits.