The Story
Built in 1929 as a toll bridge for $3 million, the Chain of Rocks Bridge has a unique 22-degree bend at its center - necessary because straight construction would have put bridge piers over bedrock that couldn't support the weight, and would have obstructed the castle-like water intake towers for St. Louis's water supply.
Route 66 was rerouted over this bridge in 1936. The narrow bridge with its sharp bend became a legendary bottleneck - two tractor-trailers couldn't pass each other.
When the New Chain of Rocks Bridge opened 2,000 feet upstream in 1967, the old bridge closed in 1968. After decades of abandonment, it reopened in 1999 as a pedestrian and bicycle path.
Surprise Facts
→ The 22-degree bend was necessary because the riverbed couldn't support straight piers
→ Two tractor-trailers couldn't pass each other on the bridge
→ Now you can walk across the Mississippi on original Route 66 pavement
→ The 'chain of rocks' refers to the rocky riverbed that gave the area its name
Visit Information
✓ Open to Visit
Address: 10800 Riverview Dr, Madison, IL 62060
Hours: Dawn to dusk for pedestrians/cyclists
Tip: Walk to the center to see the famous 22-degree bend