The UNC steam tunnel replacement project involved constructing over 2,000 linear feet of new underground cast-in-place concrete tunnel to replace an existing walkable tunnel dating to 1939 with major structural failure and asbestos insulation as well as and an accessible tunnel built in 1987. This new tunnel provides low- and high-pressure steam (40/150 PSIG) and pumped condensate piping. A unique challenge on this project was the close proximity of residential neighbors to the construction site – sometimes only feet away from the trench.