The combined canal system was the largest canal system in the world, but was profitable for only a short period. The canal was useless in winter, and the banks were constantly caving in, requiring constant dredging to remain passable. To protect the banks, canal boats had to operate at extremely slow speed. The canal system started being abandoned even before it was completely built. The coming of the railroad quickly supplanted the canals as the primary means of long-haul travel.
