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Today in History: Hoover Dam Completed, Transforming Arizona-Nevada Landscape

3/1/2026

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Summary

Story summary

On March 1, 1936, the Hoover Dam, a monumental concrete arch-gravity dam on the Colorado River, was completed. Constructed during the Great Depression, it involved thousands of workers and claimed over 100 lives. Initially named Boulder Dam, Congress restored its original name in 1947, recognizing its significance in American engineering and infrastructure.

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Story summary

On March 1, 1936, the Hoover Dam, a monumental concrete arch-gravity dam on the Colorado River, was completed. Constructed during the Great Depression, it involved thousands of workers and claimed over 100 lives. Initially named Boulder Dam, Congress restored its original name in 1947, recognizing its significance in American engineering and infrastructure.