A double-helix staircase is being installed at Many Glacier Hotel on the shore of Swiftcurrent Lake in Glacier National Park. The staircase is a replica from the original hotel built in 1914-15. (Courtesy Photograph)
April 29, 2017
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April 29, 2017 7:26 p.m.
Double-helix staircase a focal point of Many Glacier restoration
Building a spiral staircase involves some tricky math. And building a double-helix staircase on its original footprint in a century-old lodge is even trickier.