Parks Canada explores unknown underground structure at Lake Minnewanka

Parks Canada is exploring an underground structure discovered below the surface of Lake Minnewanka in Banff National Park after part of the beach collapsed.

Officials in Banff National Park are busy exploring a mysterious underground structure that was recently discovered near Lake Minnewanka.

In early May, Parks Canada responded to the beach of the lake after a portion of ground collapsed.

On closer examination, staff determined it was caused by the roof of “a previously unknown underground structure” caving in.

Parks Canada said the structure appears to be built out of untreated wood, including log walls and rough-cut planks.

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It’s not clear exactly what the structure is, given that no historical plan or photograph gives any information about its exact origin.

Officials believe it could be part of the old Lake Minnewanka Campground, but that’s only a guess.

“It is possible that this feature was related to the Lake Minnewanka Campground and was likely installed in early 1944,” Parks Canada said in a statement Tuesday.

“Heritage specialists are assessing the site to better understand the structure’s origin and any potential heritage or archaeological significance.”

The campground closed in 1952 and was converted into a day-use area when the Two Jack Lake Campground officially opened, Parks Canada said.

In the meantime, the area has been fenced off to keep members of the public safe.

“The ground around the structure is unstable and further localized collapse may occur. The fencing marks and secures the area of concern, and no risks have been identified beyond it,” officials said.

After assessments are complete, staff will work to stabilize and restore the site as per regular environmental and safety protocols.