Yellowstone hotel reopening for winter; temporary sewage treatment required

The historic Mammoth Hot Springs Hotel in Yellowstone National Park will reopen for the winter season after being shuttered all summer.

The facility had to close after the North Entrance road was washed out by the Gardner River during high water in mid-June. Buried alongside the road was a sewer line that carried wastewater from Mammoth to the nearby Gardiner sewage treatment plant. Thousands of gallons of raw sewage flowed into the Gardner River for about a day-and-a-half when the pipe was ruptured.

Park crews eventually rerouted the wastewater into old percolator ponds used from the 1930s to 1960s, enabling Mammoth residents and workers to stay throughout the summer.

“It’s probably the first time you’ll hear me say I’m glad there was some 1960s infrastructure still around,” park Superintendent Cam Sholly noted.

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The Mammoth Hot Springs Hotel will reopen to guests this winter after being closed all summer.

Courtesy Xanterra Travel Collection

However, it was decided that adding additional strain on the aged sewage system with hotel guests and

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