The activities analyzed in the EA include seismic surveys, deep-tow side-scan surveys, electromagnetic surveys, geological and geochemical sampling, and remote-sensing surveys which are used extensively to support oil and gas exploration in the Gulf of Mexico. The impact-producing factors considered in the EA include seismic survey noise, vessel and aircraft noise, seafloor disturbance, and space-use conflicts with seismic arrays. Each year there are about twenty MMS-permitted 3D seismic surveys conducted in the Gulf of Mexico.
The conclusion of the EA was that G&G activities are not expected to result in significant adverse impacts to any of the potentially affected resources. Potentially adverse but not significant impacts were identified for marine mammals, except the manatee, for which negligible impacts were identified. As a result, MMS has issued a Finding of No Significant Impact.
The EA will be included as part of an information package used by MMS in the near future to petition the National Oceanic and Atmospheric Administration. This petition will request NOAA to issue regulations to allow small "takes" incidental to seismic surveys in the Gulf of Mexico, under the enabling regulations of the Marine Mammal Protection Act.
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