Facts & Figures: Construction

Building Proposed mid-July 1941
Prime Contract Awarded 11 August 1941
Mechanical Engineering Contract Awarded 3 September 1941
Construction Began 11 September 1941
Grading Contract Awarded 24 September 1941
First Occupants Move in 29 April 1942
Construction Completed 15 January 1943
Sand & Gravel Used for Concrete (tons) 680,000
Buildings Consolidated to Populate the Pentagon 17
More Information Most of the statistical data presented here is approximate, even when the numbers are not rounded. Most of this data was compiled in the 1950s. Changes in the building since have resulted in changes in the numbers, making difficult to render precise figures.