When the Fairmount Water Works was built in the early 19th century to provide clean drinking water to Philadelphia, it was a feat of modern engineering. Steam engines and a dam across the Schuylkill River powered water wheels large enough to pump millions of gallons a day uphill to a reservoir atop nearby Fair Mount.
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For a few years now, I have been avoiding writing an article about freshwater mussels like the one Kyle Bagenstose wrote for this issue. His article airs doubts about the claim that restoring native freshwater mussels can help clean polluted waters — just as efforts are ramping up to breed and reintroduce mussels to our
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