Causes and risk factors of Barrett's esophagus As with most diseases and conditions, there are certain groups of people who are at a higher risk of developing Barrett's esophagus. GERD is a condition that is closely linked to Barrett's esophagus.
Potomac River â Map & Details. print this map. Located along the mid-Atlantic coast of the United States, and flowing into the Chesapeake Bay, the Potomac River flows through Washington DC, Virginia, Maryland, Pennsylvania and West Virginia.
It is not in any state. After the US Constitution (1787) provided that a tract of land be reserved for the seat of the federal government, both Maryland and Virginia offered parcels for that purpose; on 16 July 1790, Congress authorized George Washington to choose a site not more than 10 mi (16 km) square along the Potomac River.