CDWB00049: Ad-Hoc Subcommittee of JPC on Wartime Headquarters (10 Oct 1957)

Records of this committee meeting include detailed requirements for a site for NEHQ, including risk factors like nuclear fallout as understood at the time. Considerations included predicted blast radius, fallout direction, and concerns about contamination of the water supply.  

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RG25-A-3-b, vol. 6028, file 50285-40, pt 2-1 "Emergency planning by National Defence Headquarters, in Ottawa in event of disaster", Library and Archives Canada.