Popular Geologic Feature Collapses in Glen Canyon National Recreation Area

News Release Date:
August 9, 2024

Contact:Mary Plumb

National Park Service Rangers have confirmed the collapse of a frequently visited arch in Rock Creek Bay in Glen Canyon National Recreation Area, Utah. The "Double Arch" geologic feature has also been referred to as the "Toilet Bowl", "Crescent Pool", and "Hole in the Roof". No injuries were reported resulting from the collapse, which occurred on August 8, 2024.

Double Arch was formed from 190-million-year-old Navajo sandstone originating in the late Triassic to early Jurassic periods. Since formation, this fine-grained sand feature has been subject to spalling and erosion from weather, wind, and rain. Changing water levels and erosion from wave action is suspected of contributing to the ultimate collapse of the arch.

Glen Canyon National Recreation Area Superintendent Michelle Kerns stated, "this event serves as a reminder of our responsibility and need to protect the mineral resources surrounding Lake Powell. These features have a life span that can be influenced or damaged by manmade interventions. While we don't know what caused this collapse, we will continue to maintain our resource protection efforts on Lake Powell for future generations to enjoy. Please enjoy our resources but leave no trace."

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