Beaver Dam (Maryland)

Summary

Beaver Dam is a former marble quarry in Cockeysville, Maryland, that was a source of stone for many notable buildings in the United States, including the United States Capitol and the Washington Monument. Flooded since the 1930s, the site is now a local swimming and recreational club. While there were dozens of small, abandoned quarries with various owners in the area — collectively known as the "Beaver Dam quarries" — the large quarry pit that is now a lake was the principal one. It has been called Maryland's "most celebrated building-stone quarry."

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