Police said the driver of the van tried to avoid another car in the 15100 block of West Parthenia Street, but hit the gas pedal instead of the brake. The white van came to rest about 12 feet above the wash.
"They were going on a trip, approximately 12 children on board," said Los Angeles police Sgt. Ashraf Hanna. "One of the children complained of pain."
The child was taken to the hospital for observation but later released.
The youth group continued on with their trip.