Now owned by CN.
WAUKEGAN
Tower listed with Chicago & North Western
UPTON
Tower listed with Chicago & North Western
RONDOUT
Tower listed with Milwaukee Road
LEITHTON
Tower listed with Soo Line
BARRINGTON
Mechanical interlocking installed 1890
Closed May 3, 2003, demolished August, 2006
Crossing with Union Pacific former Chicago & North Western Harvard Subdivision.
Click for Google Map of Cook County/Northwest
SPAULDING
Mechanical interlocking installed 1890
Interlocking rebuilt 1909
Closed mid 1980's
Tower relocated 1988 to Illinois Railway Museum for display and preservation
Crossing with CP former Milwaukee Road Elgin Subdivision.
Click for Google Map of Du Page County
JA TOWER (West Chicago)
Electric interlocking installed 1901
Closed 1949, remotely controlled from JB Tower
Former crossing of Elgin Joliet & Eastern with Chicago & North Western Belvidere Subdivision. In 1961, Chicago & North Western reconfigured its trackage near its West Chicago yard, enabling the Belvidere Subdivision trains to cross at JB Tower.
JB TOWER (West Chicago)
Mechanical interlocking installed 1889
Electric interlocking installed 1901
New tower constructed 1926
STILL IN USE
Crossing with Union Pacific former Chicago & North Western Geneva Subdivision.
PLAINFIELD
Little is known about this interlocking, other than it involved Milwaukee Road freight trains using trackage rights via Elgin Joliet & Eastern between Joliet and Aurora.
Click for Google Map of Will County/Northeast
BRIDGE JCT.
Electric interlocking installed 1934
Bridge over Des Plaines River.
JOLIET (AT&SF JCT.)
Interlocking installed 1898
Little is known about this interlocking, other than that in the early 1900's, this was an interchange with Santa Fe.