Olympic Coast National Marine Sanctuary Science section includes Seafloor Mapping, Oceanography, Deep Sea Coral and Sponges, Wildlife Research, Coastal Habitats, Citizen Science, Ecosystem Processes, Research Surveys, and Research Assets
Olympic Coast National Marine Sanctuary Science section includes Seafloor Mapping, Oceanography, Deep Sea Coral and Sponges, Wildlife Research, Coastal Habitats, Citizen Science, Ecosystem Processes, Research Surveys, and Research Assets
Olympic Coast National Marine Sanctuary Science section includes Seafloor Mapping, Oceanography, Deep Sea Coral and Sponges, Wildlife Research, Coastal Habitats, Citizen Science, Ecosystem Processes, Research Surveys, and Research Assets Olympic Coast National Marine Sanctuary Science section includes Seafloor Mapping, Oceanography, Deep Sea Coral and Sponges, Wildlife Research, Coastal Habitats, Citizen Science, Ecosystem Processes, Research Surveys, and Research Assets

Multibeam Seafloor Mapping
of Oceanographic Mooring Sites 2011

R/V Tatoosh Seafloor Mapping of Oceanographic Mooring Sites
Rick Fletcher, Nancy Wright, Chief Scientists
Olympic Coast National Marine Sanctuary

Download the Cape Alava Mooring Site Data (210k zip)
Download the Cape Elizabeth Mooring Site Data (210k zip)
Download the Makah Bay Mooring Site Data (268k zip)
Download the Teahwhit Head Mooring Site Data (191k zip)

Image of 42 m deep seafloor bottom near Cape Elizabeth showing foled mud ridges.
Seafloor mapping reveals folded mud ridges at the Cape Elizabeth 42 m depth site.
The National Historic Preservation Act of 1966 requires OCNMS to consider the effects of its oceanographic moorings on historic properties on the ocean floor. Historic properties are those that are included in the National Register of Historic Places (generally over 50 years old) or that meet the criteria for the national register. On the ocean floor, such properties might include shipwrecks, sunken aircraft, archaeological sites, sunken weirs, or historic canoe pathways or access routes.

With the acquisition of a hull-mounted Reson 8101ER multibeam echosounder (MBES) in 2011, the R/V Tatoosh's first project was to map ½ square km around the site of each of the 13 oceanographic moorings deployed annually by OCNMS. The data were acquired in Hypack/Hypack, processed at 2m resolution in CARIS 7.1, and products were developed in ArcGIS 10.

No historic properties were located within the mapped areas around the moorings, nor will any properties be impacted or adversely affected if the mooring locations shift within the ½ square km setting. This initial survey constitutes a baseline study which may be updated as necessary in coming years.

The majority of oceanographic moorings (7 out of 13) were located on the flat sandy sediments that predominate across the sanctuary shelf. However, multibeam mapping in six of the sites revealed interesting rocky substrates and folded muddy geomorphology. The bathymetry and imagery for four of those sites have been included here for download (ESRI geotifs), but the actual seafloor classification and characterization will await groundtruthing and further analysis of substrate type.

All data is provided in ESRI ArcGIS 10, NAD83 UTM 10. For information contact Nancy Wright.



Contact for page content: Nancy Wright
photo of a buoy on the ocean
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