"Workers at the Bingham Canyon Mine, the largest man-made excavation in the world, achieved a "tremendous amount of success in short period of time," Lengerich said. But he also noted there is a "tremendous amount of work ahead of us."
An estimated 100 million tons of material remains at the bottom of the pit and needs to be removed. Kennecott estimates it will be fully back to normal operations by 2016.
As for the visitors center, Lengerich said no conclusive plans had been made as of Wednesday.
"Our outreach to the community is really important to us, and the visitors center has been a cornerstone of that for a long period of time," he said. "We're considering all the options that are available to us."
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