The Potomac River’s water level measured 2.7 feet at the Army Corps of Engineers’ downstream gauge on Sunday when the accident occurred.

Data gathered about the bacteria levels in local river water have put several swimming and boating spots in the “safe” category on a national water safety registry. The Potomac RiverKeeper Network ...

The survey was conducted using Teledyne Optech CZMIL SuperNova lidar system, which allowed Dewberry to successfully survey a 55-mile (88.5km) stretch of the Potomac River, spanning from Hancock, ...