Some area residents might have done a 'double-take' Tuesday when they gazed on the Illinois River.
The Par-a-dice Riverboat Casino set sail Tuesday for a limited time.
The boat is required by law to undergo an annual test to make sure the boat is seaworthy.
There were no customers on the boat, just gaming officials.
The Par-a-dice sailed for three hours before returning to its dock in East Peoria.