File:Multnomah Falls Lodge is now protected by a new rockfall barrier fence. (39794838904).jpg
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| Description | During the Burned Area Emergency Response process the Forest Service identified rockfall as a potential hazard to the critical value that is Multnomah Falls Lodge. Being that it's a historic lodge we wanted to protect that. So in order to quantify the rockfall hazard the Forest Service ran a rockfall analysis using the Colorado Rock Simulation Program, a three-dimensional model that essentially rolls rocks of various sizes over a slope that scientists generated with various surface roughnesses. When they rolled rocks of various sizes they could see where the model predicts the rocks would end up, and with what energies they would get there with. So based on that study geologists and engineers designed a rock fall fence for a 98% confidence that they would catch 98% of those rocks. The outcome of that study is a new rockfall barrier that now spans behind the lodge heading west as well as across a bluff on to the west side. It is eight feet tall and has enough capacity to catch the energy of essentially an F-150 truck driving at 35 miles an hour. |
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| Source | Multnomah Falls Lodge is now protected by a new rockfall barrier fence. |
| Author | U.S. Forest Service- Pacific Northwest Region |
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This image was originally posted to Flickr by Forest Service Pacific Northwest Region at https://flickr.com/photos/135886671@N08/39794838904 (archive). It was reviewed on 13 September 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the Public Domain Mark. |
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This image is a work of the Forest Service of the United States Department of Agriculture. As a work of the U.S. federal government, the image is in the public domain.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 21:50, 13 September 2018 | | 2,016 × 1,512 (4.21 MB) | Tyler ser Noche (talk | contribs) | Transferred from Flickr via #flickr2commons |
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