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"Natural" Streams Were Shaped by Dams (1 of 2)

Caption: A milldam on Pickering Creek in Chester County, PA. The dam spans the entire valley, and is filled to the brim with sediment. This image relates to an article that appeared in the Jan. 18, 2008 issue of the journal Science, published by AAAS. The study, by Drs. Robert Walter and Dorothy J. Merritts at Franklin and Marshall College in Lancaster, PA, was titled “Natural Streams and the Legacy of Water-Powered Mills.”

Credit: Image courtesy of Robert Walter and Dorothy Merritts

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