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Science Nation: Dams--What Goes Up Must Come Down, and Then What?

2 minutes 33 seconds

Now Playing As: Captioned (English) (change)

There’s been a lot of research on what happens to a river when dams are built, but what happens when a dam is torn down? With support from the National Science Foundation, Dartmouth College geographer Frank Magilligan is researching the impact of dam removal. His lab has been at the relatively small Homestead Dam, built more than 200 years ago along the Ashuelot River in New Hampshire. He and his team have collected data on the ecology and geology of the Ashuelot River both before and after the Dam removal. Now, they’ll be documenting the processes of ecological restoration and how the path of the river is changing.

Media Details

Runtime: 2 minutes 33 seconds

Topic: Business, Geography, Science
Subtopic: Construction, Earth Sciences, Ecology, U.S. Geography
Grade/Interest Level: 7 - 12
Standards:

Release Year: 2009
Producer/Distributor: National Science Foundation
Series: Science Nation
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