Maine Aqua Ventus and Alpine schedule subsea cable survey
Friday, Nov 03, 2017
Maine Aqua Ventus (MAV) and Alpine Ocean Seismic Survey, Inc., (Alpine) will begin a subsea cable survey on November 10th to survey the seabed between Port Clyde and the UMaine Deepwater Offshore Wind Test Site at Monhegan Island.

The Maine Aqua Ventus (MAV) floating offshore wind turbine demonstration project requires a seabed survey of the cable route from the wind turbine array located approximately 2.5 miles (4.0km) south of Monhegan Island and running approximately 26km (14 nm) north to the Port Clyde area.

The seabed survey will be conducted by Alpine Ocean Seismic Survey, Inc. (Alpine), utilizing the R/V Shearwater and the M/V William M survey vessels, a very experienced firm in doing this type work for offshore wind farms and the Oil & Gas industry. Alpine routinely works collaboratively with the fishing community to minimize interference with fishing gear.

The proposed cable and survey route follows an existing charted cable way specifically selected to minimize any impact on fishermen and fishing activities. Other areas to be surveyed include:  the test site 2.3 miles (3.7km) South of Monhegan Island and Upper Penobscot Bay.

A gear compensation program has been established in case of accidental fishing gear interference.  The survey will determine the seafloor conditions where the cable may be placed, to help design the cable and determine the cable installation methods. It will provide a geophysical picture of the seabed contours in addition to interpreting the geology which exists along the cable route. The survey will also determine the archeological significance of any potential artifacts that may reside on or below the seabed so that they can be avoided and protected.

This survey’s results will help to inform the Maine State Historic Preservation Office (SHPO) of the archeological significance of the seabed. The survey will be used to finalize permitting requirements for the installation of the transmission cable and identification of the turbine installation area, both designed to minimize impacts to the environment and the fishing community.

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