With the 1933 "Century of Progress" fair nearby, Commonwealth Edison equipped this substation with the needed rectifiers, to provide extra power for the added streetcars and elevated trains to serve the fair.
Now a regular Commonwealth Edison substation, served the Stockyards elevated line in addition to streetcar lines.
The construction of the Dan Ryan Expressway required demolition of the 63rd Street substation, and construction of this substation underneath the Englewood Branch of what now is the Green Line. The substation also serves the Red Line, in the expressway median strip. This CTA "Metropolitan Transit" logo was used until the mid 1970's.
Substation is viewed from a Green Line train. The yellow objects are part of where the electrical cables connect with the track and third rail.
Now a regular Commonwealth Edison substation, one block north of the Cottage Grove station on the Green Line.
CTA substation, built in 1972, east of the Cottage Grove station on the Green Line.