The Colossus of the Colorado: Building the Hoover Dam
During the early 1900s, the wild Colorado River was both a blessing and a curse. It provided water to dry desert farms, but springtime melting snow caused violent floods that destroyed crops and homes. To tame the river, the United States government planned a massive engineering project: a giant concrete dam in the Black Canyon, right on the border between Nevada and Arizona. This structure, later named the Hoover Dam, would become one of the greatest engineering feats in human history.
Before any concrete could be poured, engineers had to solve a major problem: how to move a rushing river out of the way. Workers used dynamite to blast four immense diversion tunnels through the canyon walls. Once these tunnels were finished, the river was blocked with rock barriers and forced to flow around the construction site. For the first time in history, the riverbed of the Black Canyon lay dry and ready for building.
- diversion:
- The act of turning something aside from its natural path or direction, such as redirecting a river.
- cure:
- To harden and strengthen over time through a chemical process, especially used when describing concrete.
- reservoir:
- A large natural or artificial lake used as a source of water supply.
- ingenuity:
- Cleverness, original thinking, or skill in solving difficult problems.
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Preview questions from this passageShowHide
- 1What double-sided role did the Colorado River play in the lives of people during the early 1900s?
- 2Where exactly was the Hoover Dam built?
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About this report passage for Upper Elementary
“The Colossus of the Colorado: Building the Hoover Dam” is a report reading passage about Hoover Dam Construction, written for Upper Elementary. It takes about 3 minutes to read (482 words) and comes with an interactive quiz and a printable worksheet with comprehension questions and an answer key.