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Explore a diverse collection of engaging videos showcasing the latest research, discoveries, and educational content from the U.S. Geological Survey. Dive into the fascinating world of geology, hydrology, ecology, and natural hazards as we bring science to life. Stay informed and inspired by our visual storytelling that highlights the vital work of USGS scientists and their impact on the planet.

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Old time video title screen reads "The Survey of the Grand Canyon of the Colorado River in Arizona" Old time video title screen reads "The Survey of the Grand Canyon of the Colorado River in Arizona"
1923 Survey of the Grand Canyon of the Colorado River in Arizona
1923 Survey of the Grand Canyon of the Colorado River in Arizona

The survey of the Grand Canyon of the Colorado River in Arizona. This survey, perhaps the most difficult ever undertaken by government engineers, was made to show the possibilities for development of power. Every feasible dam site was surveyed and the flow of all tributary streams was measured.

The survey of the Grand Canyon of the Colorado River in Arizona. This survey, perhaps the most difficult ever undertaken by government engineers, was made to show the possibilities for development of power. Every feasible dam site was surveyed and the flow of all tributary streams was measured.

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