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Hatfield Marine Science Center Dynamic Revetment Report DSL permit #45455-FP Monitoring Report February, 2012

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  • The Hatfield Marine Science Center (HMSC) is an interagency campus in Newport, Oregon with a mission of research, education and outreach in marine sciences through collaborative partnerships. Located on a 49 acre site on Yaquina Bay, Oregon, it is adjacent to diverse habitats, many of which are subject to action of waves and tides. A Dynamic Revetment (gravel beach) was installed in November, 2011 on the shoreline along the northeastern edge of the HMSC to mitigate erosion that threatened HMSC critical infrastructure. Shoreline topographic and biological monitoring was initiated before and continued after the project completion. Monitoring of beach profiles along the project area showed that a Dynamic Revetment installed in 2007 had been successful in stabilizing further retreat of the beach. As of January 2012, the 2011 project also appears to have stabilized the shoreline, while rapid erosion has continued in the adjacent Reference beach area. For invertebrates, fish, and vegetation, only pre-installation comparisons of the project (DRP) and Reference beach have been conducted. For both invertebrates (infauna, beach wrack associates) and fish, there were statistically significant differences over the combined DRP and Reference beaches reflecting small scale ecological variability. Shoreline vegetation also displayed some differences in species composition in preinstallation sampling, but total shore vegetation cover did not differ significantly between the two beach areas. Visual counts of marine mammals and birds were conducted both pre- and post-installation. There were no marine mammals observed, and no birds were observed prior to the project. Variability among observation periods was extremely high, with many zero observations. There were no statistically significant differences in the number of birds observed based either on tide (high vs. low) or sample area (DRP vs. (Reference). Post-installation sampling for all the above parameters will continue.
  • The information in this document contained in sections 3.1 and 3.3 has been subjected to review by the National Health and Environmental Effects Research Laboratory of US EPA and approved for publication. Approval does not signify that the contents reflect the views of the Agency, nor does mention of trade names or commercial products constitute endorsement or recommendation for use.
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  • Boehlert, G. et al. 2012. Hatfield Marine Science Center Dynamic Revetment Report DSL permit #45455-FP Monitoring Report February, 2012. Newport: HMSC, OSU. 31 pp.
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