Historic Bridges
of the United States
I-270
MO-IL
Design
Status
Location
Builder
Waterway
Road
Railroad
City
Year
New Chair of Rocks Eastbound
(St. Louis, Missouri)
Built 1964
Steel stringer bridge over Mississippi River on I 270 E in St. Louis
Open to traffic
New Chair of Rocks Westbound
(Madison County, Illinois)
Built 1966
Bridge over Mississippi River on I 270 W
Open to traffic