Abandoned 1976-1985.
On the double track between Clarks Hill and Indianapolis, many of these towers had primarily served as block stations, also controlling crossovers for the convenience of occasional left hand running.
REX
Interlocking installed after 1908
Closed 1942, remotely controlled from Clarks Hill
Primarily a block station, on the single track between Altamont and Clarks Hill.
CLARKS HILL
Tower listed with Nickel Plate
COLFAX
Mechanical interlocking installed 1908
Replaced with automatic interlocking 1966
Former crossing with Pennsylvania Railroad Crawfordsville Branch, abandoned early 1970's.
HAZELRIGG
Electric interlocking installed 1930
Closed by mid 1950's
LEBANON
Non interlocked crossing
Former crossing with Central Indiana Railway, abandoned 1982.
DALE
Electric interlocking installed 1930
Closed by mid 1930's
GLENN
Electric interlocking installed 1930
Closed 1952, remotely controlled from Brant
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BRANT
Electric interlocking installed 1908
Closed 1961, replaced with CTC installation in Indianapolis
Former junction with Peoria & Eastern line.
KD TOWER (Indianapolis)
Mechanical interlocking installed 1909
Closed 1966, remotely controlled from IJ Tower
Crossing with Indianapolis Belt.
IJ TOWER (Indianapolis)
Electric interlocking installed 1917
Closed 1980's
Junction with Illinois Division, and Pennsylvania Railroad Indianapolis Division, west of Indianapolis Union Station.
Clarks Hill-Indianapolis
Installed 1961, control machine likely in dispatcher's office in Indianapolis