Interior Secretary Ryan Zinke's timetable for reorganizing his department and its bureaus calls for the overhaul to be "operational" by July 1, 2019.

If the Lewis River Bridge in Yellowstone National Park becomes too unsafe for traffic, the South Entrance to the park will essentially be a dead-end for tens of thousands of visitors, who instead would have to make an hours-long detour to reach one of the park's other entrances. That's the scenario the park staff has drawn in an environmental assessment calling for the 58-year-old steel-and-concrete span to be replaced.

Mammoth Cave National Park officials are investigating two acts of vandalism observed at Joppa Church over the past week. On Sunday, October 28, a spray-painted two-foot by three-foot image was discovered on the church floor, and on Thursday, November 1, multiple windows were found broken or cracked.

Beautiful shorelines, historic lighthouses, Native American archaeological sites, and maritime history held in a chain of islands in Lake Michigan are among the attributes of a proposed national park in Wisconsin. It sounds very similar to an existing unit of the National Park System, Apostle Islands National Lakeshore, which could make this effort particularly challenging.