An employee at a resort outside Yellowstone National Park was found dead last week after apparently drowning in the high waters of the North Fork of the Shoshone River.

Susan C. Hartley, a 56-year-old woman from Chichester, New Hampshire, had been working at Pahaska Tepee Resort this summer.

Hartley was last seen on the afternoon of Tuesday, July 2, according to a news release from the Park County Sheriff’s Office. When she didn’t report for work on the morning of Wednesday, July 3, fellow employees began looking for her. They found her backpack and walking stick just east of Pahaska, underneath a bridge that crosses the Shoshone River on U.S. Highway 14/16/20.

Because of the circumstances, personnel at the resort called the sheriff’s office and at 11 a.m., the county’s search and rescue unit was dispatched to the scene.

While searchers and a canine team were en route, Pahaska workers spotted Hartley’s body about a half-mile downriver, across from the Pahaska Trailhead.  With the river “swollen and moving rapidly from the spring runoff,” search and rescue deployed its swift water team to recover her body.

“Although the exact cause of death is pending an autopsy, there were no apparent signs of foul play and [Park County Tim] Power has preliminarily ruled Hartley drowned,” Lance Mathess, a spokesman for the sheriff’s office, said Thursday. An autopsy was being conducted on Monday.

It was the second time in as many months that the sheriff’s office was called to Pahaska Tepee for an incident involving one of the resort’s employees. On June 17, a 24-year-old worker was accidentally shot when a fellow employee’s vintage pistol went off inside a backpack and hit the man in the shoulder.