On June 12, extreme flooding tore through Yellowstone National Park. Shortly after, a team of engineers arrived to document how geostructures like dams and bridge foundations held up, or didn’t, during the flooding.

The team, whose work is sponsored by the National Science Foundation, is part of the Geotechnical Extreme Events Reconnaissance (GEER) Association. GEER members arrive onsite to collect perishable data, like the condition of bridge piers and abutments damaged during flooding, before the data is erased during recovery efforts. The collected data and observations, which are open access, helps the researchers to better understand how and why structures failed and how engineers can build them to withstand flooding events in the future.

Assistant Professor Michael Gardner, a GEER member, was in Yellowstone shortly after the flood. It’s important for the researchers to arrive quickly after the event so they can gather the perishable data, but there are other issues at stake.

“There are more important groups working in the area,” Gardner said, like disaster response groups working to restore access to small towns whose roads were washed away. “Our focus is on gathering as much pertinent data as possible, while not getting in the way of recovery efforts.” Fortunately, there were no deaths caused by the flood, but Gardner has responded to deadly events in the past as part of a GEER team.

According to the National Park Service’s website, $50 million will be allocated to emergency funding to repair and reopen Yellowstone to visitors. Gardner said it’s likely other national parks are looking to Yellowstone’s severe flooding as an example and may start looking at reinforcing their own infrastructure.

Data was collected using a variety of instruments provided by the NHERI RAPID Facility which is headquartered at the University of Washington (UW), and is a collaboration between UW, Oregon State University, Virginia Tech, and the University of Florida. The instruments used included LiDAR, drones and multispectral cameras. Drones help researchers access locations that they couldn’t reach otherwise due to the flooding.

The gallery below includes a series of photos from the flooding in Yellowstone, courtesy of the GEER Association.