Old Chicago Photos - ChicagoPhotoShop
This 1918 photograph shows the approach to the Dearborn Street Bridge looking north across the Chicago River. Note both the horse drawn wagons and the electric streetcars in use.

Photographer: Unknown
Source: Chicago Historical Society (ICHi-37375) 

http://encyclopedia.chicagohistory.org/pages/10800.html

This 1918 photograph shows the approach to the Dearborn Street Bridge looking north across the Chicago River. Note both the horse drawn wagons and the electric streetcars in use.

Photographer: Unknown
Source: Chicago Historical Society (ICHi-37375)

http://encyclopedia.chicagohistory.org/pages/10800.html