Workers at one of the nation’s largest meatpacking plants who staged a multiweek strike have reached an agreement with plant owner JBS USA, the company and labor union representatives announced Sunday.

The Swift Beef Co. plant in Greeley, Colorado, will immediately return to normal operations after weeks of uncertainty, JBS USA said in a statement.

The agreement comes after thousands of workers at the meat processing plant led a three-week strike with the United Food and Commercial Workers Local 7 Union in a bid for higher wages and better health care. The strike ended April 4 after JBS USA agreed to resume negotiations.

Workers and JBS USA agreed to wage increases over the next two years and a $750 one-time bonus. The tentative agreement represents a contract with “all gains, countless improvements, and not a single concession,” the union said.

The contract requires the company to pay for personal protective equipment and defends workers against increases in health care costs, according to the union.

Local union president Kim Cordova said workers picketed through extreme weather “because they knew their worth and refused to be disrespected. Today, that sacrifice has been rewarded.”

“This is what union power looks like,” Cordova said in the statement.

The union did not immediately respond to The Associated Press’ requests for further details.

JBS USA said it is pleased an agreement has been reached, but expressed disappointment that union leadership chose to eliminate pension benefits that were negotiated last year. The company said the pension was designed to strengthen long-term retirement security and argued the union chose to shift those dollars into short-term wage increases rather than into the long-term financial future of workers.

The union will also withdraw seven alleged unfair labor practice charges, according to JBS USA.

“With the agreement now finalized, JBS USA looks forward to restoring stability, supporting its workforce, and continuing to invest in the Greeley facility for the future,” the company said in its statement.

The strike at Greeley was the first strike at a U.S. slaughterhouse since workers walked out at a Hormel plant in Minnesota in 1985. That strike lasted more than a year and was marked by violent confrontations between police and protesters.

JBS is the world’s largest meatpacking company with a market capitalization of $17 billion. It is the top employer in Greeley, a city 50 miles (80 kilometers) northeast of Denver with a population of about 114,000 people.

Jessica Hill, The Associated Press