The state is mapping the bottom of the Hudson River. The work is part of the construction of the new Tappan Zee Bridge. It%27s supposed to help scientists understand how fish use the river.

TAPPAN'S MUSHROOM CITY; A WILDERNESS OF DECAY MARKING THE SITE OF PITHOLE.THE PHENOMENAL RISE AND FALL OF THE GREAT OIL TOWN WHICH WAS FOUNDED BY THE DEAD CITY CHAMBERLAIN.