Shell's drill rig the Kulluk grounded near Kodiak during a winter storm, in the middle of an Important Bird Area.
The US Coast Guard icebreaker the Healy in Dutch Harbor, Alaska.
The Healy is currently the United States' only functioning icebreaker.
The Bureau of Land Management's preferred alternative would protect important wildlife areas such as Teshekpuk Lake from development.
Shell's drill rig the "Kulluk" when it was docked in Dutch Harbor, Alaska.