Kennecott workers accepted the firm’s final offer.

A company official said Kennecott workers in five states voted by a three-to-one margin to accept the copper giant’s offer, which slashes wages and benefits by a reported 23%. Union officials had said that if workers had rejected the proposal, their only alternative would have been to order a strike. Kennecott, meanwhile, had vowed to recruit non-union labor. The pact cuts wages by an average of $3.22 an hour over four years.