A dam is a structure built across a stream or river to hold water back. Dams can be used to store water, control flooding, and generate electricity.
5 - 8
Conservation, Earth Science, Geology, Meteorology
Aerial view of the Hoover Dam
An aerial view of the Hoover Dam. This dam has been harvesting hydroelectric power for over 80 years now.
Photograph by Andrew Zarivny
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October 21, 2022
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