[sammyg2]

On April 10, the northeastern wall of this open pit collapsed, leaving a massive scar. In total, Kennecott estimated about 165 million tons (150 million metric tons) slid nearly 1.8 miles (3 kilometers), probably making it the largest non-volcanic landslide to have occurred in North America in modern times. The rock avalanche encompassed about 2.3 billion cubic feet (65 million cubic m) of material, enough to cover New York City's Central Park with about 65 feet (20 m) of debris.