Working in a dense urban environment with existing underground utilities without accurate subsurface records led to unforeseen obstacles during excavation. To address this situation, the team conducted extensive subsurface utility engineering investigations and field utility hole inspections to obtain a detailed understanding of existing conditions. This proactive approach minimized surprises during construction and allowed for precise planning that ultimately led to critical electrical underground infrastructure improvements designed to enhance the reliability and capacity of the city’s power distribution network.

Photo courtesy Burns & McDonnell

Spanning approximately two miles from downtown Pittsburgh to a new substation, the project includes new duct banks and utility hole systems. The team installed 57 electrical utility holes, approximately 216,000 ft of conduit and 51,000 ft of new cable with voltages ranging from 600V to 23kV. This undertaking required meticulous planning and execution in an environment where existing underground utilities presented significant challenges. The project was completed in three years, at budget and on schedule.