Located in Evanston, this concrete slab bridge carries the CTA Purple Line over Simpson Street.
Built during 1930-1931, this bridge features dual single track bridges, each with two spans of concrete slab set onto concrete substructures.
Concrete structures like this are very common for track elevations after 1915. While the dual tracks are different superstructures, they share the same abutments. These abutments are capable of expanding to four tracks.
Overall, the bridge appears to be in good condition. Little serious deterioration was noted on the bridge.
The author has ranked the bridge as being minimally significant, due to the common design.
The photo above is an overview.