Nearly 33 years of planning to complete!

In April of 1902, president Theodore Roosevelt signed the Reclamation Act authorizing engineers to begin investigating possible uses of the Colorado River. In 1922, initial plan recommendations are submitted to congress to construct the dam.

In 1933, the first concrete was poured at the Hoover Dam site. In 1935, the last concrete is poured, and the Dam’s official dedication ceremony is held.

6,600,000 tons of concrete were poured in the construction of the dam. An entire city (Boulder City) was constructed to house 5,000 dam project workers.

Nearly 54 years of planning to complete!

In 1938, initial planning and study for the interstate system began. In 1956, the Federal Highway Act of 1956 funding initial construction was signed into law by President Dwight D. Eisenhower.

The entire interstate system was not officially completed until 1992. With many changes and adjustments along the way!

The average amount of concrete poured in each mile of Interstate 3,000,000 tons. The Interstate Highway System stretches 47,622 miles.

Almost 2.5 years of logistical planning!

Initial planning began shortly after Pearl Harbor, December 7, 1941. Invasion did not take place until December 6, 1944.

1,900,000 tons of supplies and  1,200,000 troops were shipped from the U.S. to Britain to support the invasion effort.

June 6th "D-day" included a coordinated plan involving 1,000+ planes, 5,000+ ships and 160,000 troops.