Q 01/05

Hoover Dam was built in which gorge of the Colorado River?

A) Glen Canyon

B) Black Canyon

C) Boulder Canyon

D) Marble Canyon

Answer · why

B) Black Canyon

The site was originally expected to be Boulder Canyon, 20 miles upstream, and the project kept the 'Boulder Canyon Project' name even after engineers ...

Q 02/05

The dam straddles the border between Nevada and which other state?

A) Utah

B) California

C) Arizona

D) New Mexico

Answer · why

C) Arizona

The state line runs across the crest, and each side has its own clock face on the intake towers.

Q 03/05

The dam is roughly 30 miles southeast of which major city?

A) Phoenix

B) Tucson

C) Flagstaff

D) Las Vegas

Answer · why

D) Las Vegas

The city lobbied hard to be the construction headquarters and even shut its speakeasies when the Interior Secretary visited, but lost out to a purpose...

Q 04/05

Which president formally dedicated the dam on September 30, 1935?

A) Franklin D. Roosevelt

B) Herbert Hoover

C) Calvin Coolidge

D) Harry S. Truman

Answer · why

A) Franklin D. Roosevelt

The ceremony was moved up three hours the morning of the event because a reserved radio slot turned out to be 2 p.m. Eastern, not Pacific.

Q 05/05

What was the dam's official name between 1933 and 1947?

A) Roosevelt Dam

B) Colorado Dam

C) Black Rock Dam

D) Boulder Dam

Answer · why

D) Boulder Dam

The three-cent stamp issued for the 1935 dedication carried the alternative name rather than the one used today.