The Underground Booty Squad
Not nearly as extensive as the east bank, the west bank steam tunnels consist of one main deep artery running parallel to the river and several side passages. As on the east side, there are shafts leading up into buildings. The most interesting shallow section, which basically runs underneath the hallways of a complex of buildings connected by indoor walkways, does not connect to the deep tunnels except for an alarmed elevator.
-Tunnelcity, 2004