Marshall County Sheriffs deputies found Charles Taylor, 37, of Moundsville, dead at about 6 p.m. Monday at a pump station along Big Wheeling Creek.
"At this point, no foul play is suspected," Sheriff Kevin Cecil said. "He was found by himself. Nothing appears to be out of the ordinary."
Cecil said the body will be sent to the West Virginia Office of the Chief Medical Examiner for an autopsy to determine the cause of death.
"It is pretty unusual for a 37-year-old to die of natural causes," Cecil said. "At 1:45 a.m. (Monday), he was contacted by a co-worker. At some point later, they tried to contact him again, but could not reach him."
The subcontracting company performing water pumping work for Noble Energy is known as Rain for Rent, which is based in Bakersfield, Calif, but maintains an office in Triadelphia.
"Today, Rain for Rent learned about an employee who was found unresponsive at one of our job sites in West Virginia. Emergency response personnel were notified, and we are currently working with the proper authorities on an investigation, which is underway," said Rain for Rent spokeswoman Julie Doris. "Our thoughts and prayers are with this employee's family at this very difficult time."