Currituck Sound Hydrographic and Submerged Aquatic Vegetation Survey
PB Americas Inc. Raleigh, NC has partnered with the U.S. Army Corps of Engineers Field Research Facility (FRF) for a bathymetric and side-scan survey of the Currituck Sound located in Northeastern North Carolina. The purpose of the project was to map the bottom depths and identify areas of Submerged Aquatic Vegetation (SAV) for the North Carolina Turnpike Authority proposed mid-Currituck Bridge project. In July 2007, the FRF's hydrographic survey team mapped 6.7 square miles of bottom structure with a shallow draft vessel (~0.30m) equipped with GeoAcousticsŪ interferometric (phase measuring) sonar and a bottom grab sampling device to characterize bottom substrate.


Equipment used during survey

Map of project area in Currituck Sound.
Yellow lines represent potential bridge corridors

The majority or 4.64 square miles (69 percent) of the bottom material in the survey area was composed of fine sands. The survey identified 1.31 square miles (19 percent) of submerged aquatic vegetation, mostly in shallow areas, and 0.76 square miles (11 percent) of course grained sediment that included oyster shell hash.

Bathymetry map relative to NAVD88(feet)

Side Scan backscatter with areas
of SAV identified in red
For more information, contact Mr. Mike Forte (Michael.F.Forte@usace.army.mil) (252)261-6840 ext 228
FRF Research Physical Scientist, Beach and near shore mapping specialist.

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