July 13 the Toronto Terminals Railway (TTR) was incorporated by the Government of Canada to “construct, provide, maintain and operate at the City of Toronto a union passenger station”.

The construction of the new 3rd Union station was underway with TTR’s supervision. During this time was the First World War, which significantly delayed the progress of the station due to shortage of workers and materials.

Grand Trunk Railway which owned 50% of TTR along side with Canadian Pacific Rail went bankrupt. GTR was fully nationalized by the federal government and merged into the Canadian National Rail, which assumed the other 50% of TTR and Union station. Thus for making CN and CPR both 50% owners of TTR and Union station.

TTR supervised the construction of the train shed.

Union station was opened up to the public. The system approach tracks were designed and implemented by TTR and its owners.

TTR opens the Central Heating Plant (CHP) which was fuelled by coal and heated the underground tunnels, Union station, passenger cars which were stored in the coach yard, Royal York hotel, Dominion Public Building, Federal Post Office and CN and CP Telecommunications.

Construction of Station tracks completed.

GO Transit was created.

Two new tracks constructed to accommodate growing levels of traffic, due to GO Commuter trains and VIA Rail passenger service.

John Street Roundhouse and the CHP was closed, due to the declining demand for steam.

The City of Toronto purchased Union station from TTR while Go Transit purchased the Railway corridor (USRC). TTR still maintained and operated the station, train sheds and USRC as per contract from the City and GO.

The federal government budgeted large sums of money to assist GO Transit, VIA and the City of Toronto in developing and upgrading the station this includes large sections of track which have been upgraded with better signals and snow clearing devices to help reduce winter delays.

The city of Toronto ended their contract with TTR and manages the station with City employees. TTR still maintains and operates the train shed and USRC as per the contract with GO.