GRIT provides a much more detailed look at how rivers merge and split, which could enhance hydrological modeling, flood ...

Maps have been around since humans could communicate through drawings to describe the location of a specific place. Some of ...

The $48 million project, a decade in the making, will ultimately connect Center City with the Grays Ferry neighborhood in ...

The Youghiogheny River at Ohiopyle State Park gained nearly 10 feet in water level between 7 p.m. Tuesday and 2 a.m.

The Mississippi River is considered the most endangered in the U.S. due to uncertainty over the Federal Emergency Management Agency's future, according to an environmental group based in ...