Planner's Reading Room
Planning and compliance efforts are guided by a variety of official National Park Service documents as well as scientific research, design guidelines and supporting legislation.
National Park Service Policies:
National Park Service Directives:
National Environmental Policy Act and Other Environmental Policies:
Wild and Scenic Rivers Act and Wilderness Act Information:
Historic Preservation Information:
Public Comments Information:
Federal Codes and Policies:
Did You Know?
Rockfall events have helped shape many of the outstanding features along Yosemite Valley's walls, including Royal Arches, North Dome, and Half Dome. Giant talus slopes that slant away from the Valley walls accumulate debris with each rockfall event.