SAN FRANCISCO (CBS 5) — An eleventh-grade student from Windsor High School survived a plunge off San Francisco’s famed Golden Gate Bridge on Thursday, authorities told CBS 5.

The 16-year-old was participating in a humanities class field trip and was crossing the bridge when he jumped off near the bridge’s South Tower and into San Francisco Bay, said Windsor Unified School District Superintendent Bill McDermott.

Witnesses to the incident, which occured shortly after 11 a.m., used the word “traumatizing” to describe what they had seen.

Miraculously, the boy survived the fall of about 220-feet and was rescued by a nearby surfer who paddled over to him, authorities said.

The boy was being evaluated at a San Francisco hospital for injuries, reportedly including a broken tailbone and torn lung, but neither school or fire officials could provide further details on his condition.

McDermott said he didn’t think the boy was trying to committ suicide, but said it was possible he jumped as a result of a dare by fellow classmates; authorities were still investigating what led up to the incident.

The Marin County Coroner’s Office and the Golden Gate Bridge District indicated that up to 1,500 people have died jumping off the bridge since it opened in 1937. Last year, 32 people were killed in bridge jumps.

Authorities estimate someone jumps off the Golden Gate on average of once every two weeks; 98% of those plunges end up being fatal and most of those deaths are ruled suicides.

A recent study found more students hurl themselves off the bridge than any other demographic group.

McDermott said this was the first time an incident of this magnitude had ever occured on a school field trip in the Windsor district.