Synopsis

The St. Lawrence Seaway is a remarkable feat of engineering—a watery staircase raising enormous vessels hundreds of feet over a distance of more than two thousand miles. It represents the world’s longest inland waterway, an intricate network of rivers, lakes, canals, dams, and locks extending 2,400 miles. Constructed in defiance of powerful currents and harsh winters, it stands as one of the greatest achievements of the twentieth century. Vital to the commercial infrastructure of both the United