
kennecott utah copper has suspended mining inside one of the worlds deepest open pits as geologists assess a landslide the company says it anticipated for months.,kennecott announces layoffs after landslide,may 03, 2013 kennecott announces layoffs after landslide. a utah mining company announced thursday that it plans to lay off some of its 2,100 workers because of a landslide that filled the bottom of a copper mining pit in the mountains west of salt lake city with millions of tons of rock and dirt.