Tamanend bottlenose dolphins are seasonal visitors to the Chesapeake Bay and Potomac River. They are a coastal population of ...

It will continue to get harder to ensure there’s enough drinking water from the Potomac River, according to a group that coordinates with D.C.-area water companies.

A Spirit of Washington lunch cruise boat took on water in the Potomac River shortly after leaving the D.C.'s Wharf on a test ...

The George Washington Parkway is undertaking a new initiative to upgrade and replace several of its drinking fountains, ...

Flight instruments probably led the Black Hawk crew to believe the helicopter was lower than it actually was before the ...

The National Transportation Safety Board released new details Wednesday about the final moments before a mid-air crash ...

It is the second of three days of witness testimony and public inquiry by the National Transportation Safety Board into ...

Photo / Petty Officer 1st Class Brandon Giles, US Coast Guard via ) Investigators painted a devastating picture today of ...

Part of the helicopter that was recovered from the Potomac River in 2005.© Gerald Herbert/AP Godfrey hugs 2-year-old daughter, Logan, following the crash.© Bill O'Leary/The Washington Post ...

Investigators conclude pilots of Black Hawk did not hear warning from air traffic controllers to pass behind jet ...