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The Mississippi River at low stage rushes over the low-water dam that was built along with construction of the Chain of Rocks canal and lock at Granite City. The dam maintains enough depth upriver to permit barge traffic from Alton to the Granite City lock. The barge canal is on the far side of the island in the background of this November 1966 photograph. (Gene Pospeshil/Post-Dispatch)
Caption: The Mississippi River at low stage rushes over the low-water dam that was built along with construction of the Chain of Rocks canal and lock at Granite City. The dam maintains enough depth upriver to permit barge traffic from Alton to the Granite City lock. The barge canal is on the far side of the island in the background of this November 1966 photograph. (Gene Pospeshil/Post-Dispatch) Album ID: 1199804 Photo ID: 34835730