17 April 1962: Expansion of EASE Automatic Telegraph Relay Centre/Relocation of HYDRA Telegraph Relay Centre

A more detailed breakdown for the $700,000 cost of the HDYRA move can be found in this letter from E.B. Miller, Deputy Director of National Defence to J.A. MacDonald, the Assistant Secretary of the Treasury Board.   

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Hydra Communications - Policy, RG24, 1250-36 Vol. 2, Library and Archives Canada (LAC)