LAS VEGAS — Las Vegas’ powerful Culinary Union has scored a victory against a holdout casino chain that it has clashed with for more than a decade.

The labor group says 67 percent of workers at the Boulder Station casino voted for union representation over the weekend in a secret-ballot election monitored by the National Labor Relations Board. It’s the first of Station’s nine major Las Vegas-area casinos to unionize.

The union’s chief says she hopes contract negotiations will begin as soon as possible between management and more than 570 union-eligible workers at the casino.

Station Casinos President Richard Haskins said the company is disappointed with the result but will bargain in good faith. Haskins said the union had vilified the company and waged a “corporate terrorism campaign” against them ahead of the election.