Stillwater Mining Co.reported that union employees at the company’s Stillwater mine and Columbus processing facility, represented by the USW International Union Local 11-0001, have failed to ratify the tentative labor agreement reached on May 27. The negotiating committee for the union and the representative for USW International had unanimously recommended that their members approve the tentative agreement.

“We are disappointed that the tentative agreement was not ratified,” said Mick McMullen, president and CEO, Stillwater Mining. “Based on this decision by the union members, company management is considering all alternatives to create a situation that will best promote the long-term economic viability of operations.”

The current contract will expire at midnight on June 12.