Lawyers for Washington state were expected to have past grocery chain mergers — and their negative consequences — in mind when they went to court Monday to block a proposed merger between Albertsons and Kroger.

The case is one of three challenging the $24.6 billion deal, which was announced nearly two years ago. The Federal Trade Commission is fighting the merger in federal court in Oregon, where closing arguments are expected Tuesday. Colorado also has sued to block the merger.

But if the merger goes through, Washington residents would feel the impact more than the people of any other state. Albertsons and Kroger own more than 300 grocery stores in the state and control more than half of grocery sales there.

Under a plan to ease regulators’ concerns, Kroger and Albertsons would sell 579 overlapping stores, 124 of them in Washington, if the merger goes through. That’s the highest number among the 19 states with stores on the list. The state attorney general’s office says the proposed buyer, C&S Wholesale Grocers, has little experience running stores or pharmacies.

Washington seeks to avoid the situation it found itself in a decade ago, when Albertsons bought the Safeway chain. To satisfy regulators concerned about that deal’s potential impact on supermarket competition and consumers, Albertsons sold 146 stores to Haggen, a small grocery chain based in Bellingham, Washington.

But Haggen struggled with the expansion. Within six months, it had closed 127 stores — including 14 in Washington — and laid off thousands of workers. Haggen sold its remaining stores to Albertsons in 2016. Now, 10 Haggen stores in Washington are on the list to be sold if the merger happens.

“It’s pretty terrifying,” said Tina McKim, a founding member of Birchwood Food Desert Fighters, a group that sprang up in 2016 after Albertsons closed a store in Bellingham’s Birchwood neighborhood.

Albertsons and Kroger say the merger would help them better compete with growing rivals like Walmart and Costco.