A houseboater on Lake Powell died on June 9, 2016, after being electrocuted on his boat. This is the fourth fatality in the Glen Canyon National Recreation Area this year.

John Ruppert, 35, of San Bernardino, California, was vacationing in Oak Canyon, a popular boating and camping area on Lake Powell, with his wife and two children.

It was evident that Ruppert was electrocuted on the houseboat, and not in the water, but the exact cause of the electrocution is still being investigated by the National Park Service and San Juan County Sheriff’s Office, with assistance from the United States Coast Guard.

Glen Canyon dispatch received a call for help just after 8:30 p.m. on June 9. Guardian Life Flight responded immediately, sending a helicopter to Oak Canyon, which is approximately 50 miles from the nearest marina. Resuscitation efforts were unsuccessful and Ruppert was pronounced dead on site.

“Our thoughts are with the family of John Ruppert,” Billy Shott, Glen Canyon National Recreation Area Superintendent, said. “Tragedies like this are a reminder that people need to be cautious when recreating at Lake Powell.”