Plans to replace a defective bridge on the Congaree River call for rebuilding a causeway system crossing a flood plain in Congaree National Park. The plan's critics insist that modifications are needed to minimize environmental impacts and improve recreational access.

Despite two Government Accountability Office reports that say environmental regulations are not impeding the work of the Border Patrol, Republicans on the House Natural Resources Committee are standing by that claim.

Debris from an enormous trash-laden vortex in the North Pacific is delivered to Hawaiian Archipelago shorelines, making beach cleanups a never-ending task at Kalaupapa National Historical Park.

How's the salmon population doing in Glacier Bay National Park? With increasing fishing pressure, it's an important question, and the park is proposing a high-tech, low-impact method to gather some key information. The study site is located in designated wilderness, and the park is inviting public input on the idea.