American Symbols & Landmarks1935

3.25 million cubic yards of concrete

Cubic yards of concrete in the dam

Hoover Dam contains approximately 3.25 million cubic yards of concrete.

Including the powerplant and associated structures brings the total to approximately 4.4 million cubic yards.

Source

Hoover Dam project detailsU.S. Bureau of Reclamation

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American Symbols & Landmarks

Years the flag carried 15 stripes

The American flag had 15 stripes from 1795 to 1818.1795-1818Read it American Symbols & Landmarks

Stars and stripes on the Fort McHenry flag

The flag that inspired "The Star-Spangled Banner" had 15 stars and 15 stripes.1814Read it American Symbols & Landmarks

Feet, as originally made

The original Star-Spangled Banner measured 30 feet by 42 feet.1813Read it