Workers at the JBS meatpacking plant in Greeley have voted overwhelmingly to authorize an unfair labor practice strike.

According to United Food and Commercial Workers Local 7, ninety-nine percent of union members approved the strike authorization on Wednesday. The union represents about 3,800 workers at the plant. No strike date has been set.

Union leaders say the vote comes after months of stalled contract negotiations and what they allege are violations of federal labor law, including retaliation against workers, changes to working conditions without notice, and discipline tied to union activity.

JBS responded Thursday, saying the company has bargained in good faith and offered meaningful wage increases and a pension plan — terms it says workers at other facilities have already accepted.

The union disputes that claim, saying most workers are being offered just a 90-cent-an-hour raise, which does not keep pace with inflation or the rising cost of living in Greeley. The union also cites safety concerns, fast line speeds, and charges for damaged protective equipment.

If a strike occurs, it would be the first in the Greeley plant’s history.