en.wikipedia.org
en.wikipedia.org
en.wikipedia.org
britannica.com
education.nationalgeographic.org
National Geographic Education
https://education.nationalgeographic.org › resource › dams
ohiodnr.gov
dailycivil.com
en.wikipedia.org
build-construct.com
build-construct.com
https://build-construct.com › water-resources › dams
earthreminder.com
worldatlas.com
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