New Jersey’s Paterson is among the nation’s oldest planned industrial cities, but it has fallen on hard times since the once-booming silk industry there declined in the latter half of the 20th century. Much of the industry in this city of 150,000 has since left, but now a geological attraction once envisioned by Alexander Hamilton as something that could be harnessed for industrial might, is fully protected, and could be channeled, this time, for its community-building potential.