Rock Creek is a tributary of the Potomac River, in the United States, that empties into the Atlantic Ocean via the Chesapeake Bay. The 32.6-mile creek drains about 76.5 square miles. Its final quarter-mile is affected by tides. From Wikipedia
Robert F. Kennedy Jr. swam with his grandchildren in a D.C. creek known for sewage contamination, defying a decades-old National Park Service ban.
