the Potomac River
/ðə pəˌtəʊmæk ˈrɪvə(r)/
/ðə pəˌtəʊmək ˈrɪvər/
- a river in the eastern US. It begins in the Appalachian Mountains in West Virginia and flows 285 miles/459 kilometres past Harpers Ferry, Mount Vernon and Washington, DC, into Chesapeake Bay on the Atlantic coast.
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the Potomac River