Supplementary material to “Initial Fluvial Response to the Removal of Oregon's Marmot Dam”
Jon J. Major, Kurt R. Spicer, and Abagail Rhode, Cascades Volcano Observatory, U.S. Geological Survey, Vancouver, Washington
Jim E. O'Connor, Heather M. Bragg, Dwight Q. Tanner, Chauncey W. Anderson, and J. Rose Wallick, Oregon Water Science Center, U.S. Geological Survey, Portland, Oregon
Gordon E. Grant, Pacific Northwest Research Station, U.S. Department of Agriculture Forest Service, Corvallis, Oregon
Citation:
Major, J. J., O'Connor, J. E., Grant, G. E., Spicer, K. R., Bragg, H. M., Rhode, A., Tanner, D. Q., Anderson, C. W., and Wallick, J. R. (2008), Initial fluvial response to the removal of Oregon's Marmot Dam, Eos Trans. AGU, 89(27), 241–242. [Full Article (pdf)]Supplemental Time-Lapse Photographs (Marmot Dam_Cam3.m1v)
Marmot Dam Breach: 19 October 2007
This time-lapse movie shows the breaching of the temporary earthen dam that stood in the place of Marmot Dam on 19 October 2007, and the subsequent rapid evacuation of sediment. The earthen dam, which is about 14 meters tall and 50 meters wide, was breached by shutting off and removing a series of pumps that kept the dam dewatered, and then by using a forklift to notch the dam's crest. The black well casings that become exposed are about 10 meters tall. In some images, people are visible for scale. The images are taken at 10–minute intervals, except for the first six which are snapped at a 1–hour interval. The first image was taken at 0805 Pacific Daylight Time (PDT). The frame showing the climax of the breach was snapped at 1744 PDT (see Figure 1 of the article). The last nighttime shot was taken at 2124 PDT (less than 4 hours after the breach). The first daylight shot that follows was snapped at 0704 PDT on 20 October, and the last frame is at 1534 PDT on 20 October (about 22 hours after the breach).
For further information about this time-lapse movie, contact Jon Major, jjmajor@usgs.gov.
