The Black Diamond Police Department says officers were called to the Lake Sawyer Boat launch on Saturday night to reports of a truck and trailer in the water.
Authorities arrived at around 5:20 p.m. and saw the unoccupied truck and boat trailer fully submerged.
Mountain View Fire and Rescue assisted Black Diamond officers along with the King County Sheriff’s Office Dive Team and got the truck and trailer out of the water.
It’s not clear how the truck got in the water.