United Parcel Service is planning to close at least 22 packaging facilities across 18 states this year. According to a court filing dated Feb. 13, plans include the closure of facilities in Texas, Florida, Georgia, Maryland, and several other states.

“We’re well into the largest U.S. network reconfiguration in UPS history, creating a nimbler, more efficient operation by modernizing our facilities and matching our size and resources to support growth initiatives,” a UPS spokesperson told Fast Company about the closures. “Some positions will be affected, though most changes are expected to occur through attrition. We’re committed to supporting our people throughout this process.”

The closures will directly affect members of the International Brotherhood of Teamsters. In response, the Teamsters have filed a lawsuit over a planned voluntary buyout program which they say violates its contract.

In a statement, the Teamsters have said that they have “detailed at least six violations of its National Master Agreement by UPS in the rollout of the buyout program, including direct dealing of new contracts with workers, elimination of union jobs when UPS contractually agreed to establish more positions, and erosion of the rights and privileges of union shop stewards, among other charges.”

“For the second time in six months, UPS has proven it doesn’t care about the law, has no respect for its contract with the Teamsters, and is determined to try to screw our members out of their hard-earned money,” said Teamsters General President Sean M. O’Brien, in comments included in the statement.

A UPS spokesperson told Fast Company that the company is “disappointed” in the response.

“The world is changing, and the rate of change is accelerating,” UPS stated. “As we navigate these changes and continue to reshape our network, our drivers appreciate having choices, including the option to make a career change or retire earlier than planned.”

Here’s a list of the facilities marked for closure:

Jamieson Park facility in Spokane, Washington

Chalk Hill facility in Dallas, Texas

Jacksonville, Illinois

Rockdale, Illinois

Devils Lake, North Dakota

Laramie, Wyoming

Pendleton, Oregon

North Hills, California

Las Vegas North in Las Vegas, Nevada

Quad Avenue in Baltimore, Maryland

Wilmington, Massachusetts

Ashland, Massachusetts

Sagamore Beach, Massachusetts

Miami Downtown Air in Miami, Florida

Camden, Arkansas

Blytheville, Arkansas

Kosciusko, Mississippi

Atlanta Hub in Atlanta, Georgia

Columbia Hub in West Columbia, South Carolina

Kinston, North Carolina

Austinburg, Ohio

Cadillac, Michigan