Hundreds of feet below New Yorks 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 citys 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 workers 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.