NORAD North Bay: The Story of Living Underground (Canadian Civil Defence Museum)

The Canadian Civil Defence Museum’s account of the North Bay underground complex: construction August 1959 to September 1963 ($51 million, one-third Canada, two-thirds US), air defence operations from 1 October 1963, around-the-clock for 43 years until October 2006, and the 1982-83 ROCC/SOCC replacement of SAGE. Note its two depth figures (680 feet in the opening, 600 feet/60 storeys later in the text) - carried as-is on this site’s SAGE page.