The assessment will look at the environmental impact of the demonstration project on the 39-square-kilometre site and associated facilities.
BOEM is publishing a notice of intent for the assessment, which includes a 60-day public comment period.
Principle Power's WindFloat proposal was one of three to receive a $47 million from the US government's Department of Energy (DOE) in May to construct an offshore development.
The 30MW project will consist of five 6MW turbines on floating foundations in 425-metre deep waters. It could be the first wind project to be located off the west coast of the US.
Fishermen's Energy project in New Jersey and Dominion's Virginia offshoredevelopment were also chosen by the DOE to each receive the $47 million grant.