Utility tunnels run throughout the grounds, providing underground conduits for the various buildings. In some instances, the tunnel tops are also walkways. Steam, hot water, and other building utilities are delivered through the tunnels which provide access to the pipes for maintenance.

The tunnels experience degradation over time and have to undergo repairs for wear and tear and also to increase strength for truck access.

The tunnels in this project are located along Emmett Street and across the Lawn and can support sidewalks and even vehicles, including fire trucks for access to buildings on the Lawn.

Tunnel roof removal, replacement and wall strengthening was also required as part of the project.