PARK TOWNSHIP, Mich. (WOOD) — A body found in Lake Michigan at Holland State Park is that of a 16-year-old who was swept into the water in January, authorities confirmed Friday afternoon.

The remains of of Eliza Trainer were found shortly before 8 p.m. Thursday along the north pier, the Ottawa County Sheriff’s Office said.

The sheriff’s office said it took authorities several hours to get the body out because it was pinned beneath the surface by several large boulders.

Trainer, of the Flint area, was knocked off the pier on Jan. 1 by a large wave while visiting the park with a friend.

An autopsy confirmed she drowned and authorities said there is no suspicious of foul play.