VANCOUVER, Wash. -

A 17-year-old boy has pleaded guilty to arson for setting a fire that destroyed a Vancouver elementary school, costing $22 million to replace.

Clark County prosecutors are recommending that Dylan Mork be ordered to pay $2 million in restitution and that he get 30 days in custody when he's sentenced July 7 in juvenile court.

The Columbian reports Mork cooperated with investigators and was accompanied by his parents Thursday in court.

Court papers say Mork set fire to a coat that had been left on a bench next to Crestline Elementary School in February 2013 and thought the fire was out when he left. The fire burned the bench and spread to the school.

The three-alarm fire displaced 500 students. A replacement school is scheduled to open in September.