http://hdl.handle.net/1957/13844 2013-05-25T02:53:32Z 2013-05-25T02:53:32Z Webster, Janet G. Nelson, Walt Allan, Jonathan Stephensen, Shawn Politano, Vincent Folger, Christina http://hdl.handle.net/1957/36962 2013-02-18T20:29:29Z 2013-02-10T00:00:00Z

Hatfield Marine Science Center Dynamic Revetment Report DSL permit #45455-FP Monitoring Report February, 2013 Webster, Janet G.; Nelson, Walt; Allan, Jonathan; Stephensen, Shawn; Politano, Vincent; Folger, Christina Stabilization of the Yaquina Bay shoreline along the northeastern edge of the Hatfield Marine Science Center (HMSC) campus became necessary to halt erosion that threatened both HMSC critical infrastructure (seawater storage tank) and public access to the HMSC Nature Trail. A Dynamic Revetment (gravel beach) was installed in November, 2011 on 260 feet of shoreline to mitigate erosion. Shoreline topographic and biological monitoring was initiated before and has continued after the project completion. Monitoring of beach profiles indicated that as of December 2012, the 2011 Dynamic Revetment Project (DRP) has successfully stabilized the shoreline in the project area, while rapid erosion has continued in the adjacent Reference beach area. Erosion in the unprotected Reference area in the period 2009-2012 has been as great as 9 m (29.5 ft). Beach profile data also indicated that the 2007 DRP continued to be successful in stabilizing further retreat of the shoreline. There were significantly more invertebrates associated with beach wrack in the 2011 DRP area as compared with the Reference or 2007 DRP areas. Beach wrack did not tend to accumulate in the Reference area because of vertical beach scarps generated by erosion. The reason for the difference with the 2007 DRP area is unclear. Fish were significantly more abundant in the Reference area compared to the DRP. However, as with the pre-project sampling, maximum abundance was consistently observed at Reference Site 4, which has a uniquely high degree of physical habitat complexity, resulting from trees that have been eroded onto the shore. There were significantly greater vegetation coverage and significantly lesser presence of non-living substrata in the Reference area as compared to the DRP. These differences are consistent with pre-project site differences, probably resulting from a low area of the shoreline which allows increased flooding and associated disturbance in the DRP back shore area. There were no marine mammals observed in either the DRP or Reference areas over the 43 surveys conducted over the 2012 survey period. As was observed in the 2011 report, variability among observation periods for birds was extremely high, with many zero observations. Although there were about three times more birds observed in the Reference area, 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). The number of bird taxa observed was similar in both areas, and most abundant species were similar between the two areas. Fish, birds and wrack invertebrates, such as beach hoppers), were shown to utilize the DRP project area. Biological differences in fish, birds and vegetation observed in year 1of post-project monitoring tended to reflect differences in habitat that were present before the DRP project.

2013-02-10T00:00:00Z Boehlert, George Nelson, Walt Allan, Jonathan Harris, Erica Stephensen, Shawn Politano, Vincent Folger, Christina http://hdl.handle.net/1957/36960 2013-02-18T20:38:46Z 2012-02-10T00:00:00Z

Hatfield Marine Science Center Dynamic Revetment Report DSL permit #45455-FP Monitoring Report February, 2012 Boehlert, George; Nelson, Walt; Allan, Jonathan; Harris, Erica; Stephensen, Shawn; Politano, Vincent; Folger, Christina 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.

2012-02-10T00:00:00Z Parametrix, Inc. http://hdl.handle.net/1957/22216 2011-07-29T18:52:53Z 2005-01-01T00:00:00Z

Hatfield Marine Science Center trail erosion study : technical report Parametrix, Inc. "Erosion is impacting a portion of the Estuary Nature Trail located adjacent to Oregon State University's Hatfield Marine Science Center (HMSC) facility, located on the south side of the Yaquina Bay estuary approximately one mile from the open waters of the Pacific Ocean. The HMSC Estuary Nature Trail is important to many trail users, as it is the only trail in the Yaquina Bay estuary running along side the bay." (From the Background section, p.1-1) Includes color photographs and color infrared aerial photographs.

2005-01-01T00:00:00Z Hatfield Marine Science Center Oregon State University http://hdl.handle.net/1957/21848 2012-10-23T15:30:56Z 2011-06-22T00:00:00Z

Joint Permit Application to Stabilize Portion of Yaquina Bay Shoreline at Hatfield Marine Science Center (area of erosion along eastern edge of HMSC property) Hatfield Marine Science Center; Oregon State University These four items document the 2010-2011 permitting process to stabilize the eastern edge of the Hatfield Marine Science Center property. During late 2006, erosion forced the closure of the HMSC public estuary trail. In March 2007, an erosion control project using a gravel beach or "dynamic revetment" resulted in the stabilization of approximately 200 linear feet of shoreline. This remains stable since that time. Erosion continued at a slower rate south the original project. In the winter of 2009-2010, weather conditions resulted in rapid erosion of up to 13 feet along approximately 500 feet of the shoreline. This erosion moved the shoreline to the edge of the HMSC nature trail in one location and with 25 feet of the 800,00 gallon seawater storage facility. TO address the erosion, the HMSC applied for a permit to extend the 'dynamic revetment'. The permit was granted with limitations. The permit application, public comments and final approval are included.

2011-06-22T00:00:00Z