Rock bolts and reinforced concrete supports are among the tools the National Park Service wants to employ to stabilize the alcove in which Spruce Tree House stands in Mesa Verde National Park in Colorado. The plan, developed over the past year as the agency debated how to keep the sandstone arch from further collapse, could be implemented in September and continue through next winter.
The popular attraction, which houses the third-largest cliff dwelling in the park, with 130 rooms and eight kivas, has been closed to the public since October 2015 because of concerns that layers of sandstone could peel away from the arch at any time and fall on bystanders below. Spruce Tree House may be seen, however, from an overlook near the Chapin Mesa Museum.
https://www.nationalparkstraveler.org/2023/03/mesa-verde-national-park-has-plan-save-spruce-tree-house
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