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The real story on the Conowingo Dam and bay pollution

Carroll County Commissioner Richard Rothschild's claim that environmental groups and the federal government are downplaying the Conowingo Dam's contribution to Chesapeake Bay pollution and blaming farmers instead is anything but accurate ("Rothschild uses address to discuss Conowingo Dam, bay pollution," Jan. 12)

The U.S. Geological Survey documented the increase in sediment and phosphorus pollution coming from the dam In 2012. And in 2015 we released a report that concluded that manure and fertilizers laden with excess nitrogen and phosphorus were the main causes of degraded water quality on the Eastern Shore.

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We encourage the public to go to our website and read our report on the Eastern Shore for themselves. It is an accurate, useful summation of the state of the science about nutrients from Eastern Shore waterways and their contribution to the Chesapeake Bay watershed. The USGS stands behind its findings.

Dan Hippe, Reston, Va.

The writer is deputy director of the U.S. Geological Survey, Northeast Region.

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