The Pennsylvania Gaming Control Board announced the fine Thursday. The board says gamblers between the ages of 17 and 20 were caught playing slot machines six times at Mount Airy last year. In four of those cases the casino didn't report the violations.
As part of an agreement with regulators Mount Airy has also purchased eight electronic scanning devices to check customer driver's licenses and other identification cards.
Mount Airy vice president Matthew Magda says the casino will work to prevent future incidents and report them if they happen.
In the last two years regulators have fined Pennsylvania casinos nine times totaling $332,500 over underage gambling.
