New York Underground
[Level One Tour]

Hundreds of feet below New York’s busy streets there is evidence of human handiwork. The deepest project the city has going is City Tunnel No. 3 for the Department of Environmental Protection which will guarantee the city’s water supply. Teams of workers, known as sandhogs, have been excavating for decades.

Of great concern to the sandhogs, and all of New York, are the many faults in the deep ancient rock. The faults have the potential to ruin a worker’s day; chunks of rock weighing hundreds of pounds can fall to the tunnel floor. People forget earthquakes are also a reality for everyone; in 1984 a magnitude 4 quake hit Westchester.