Federal agencies write EIS on offshore LNG project in northeast

The U.S. Maritime Administration (MARAD) and the U.S. Coast Guard (USCG) in the Dec. 16 Federal Register will announce the availability of the Draft Environmental Impact Statement (DEIS), to be up for comment for 60 days, for the Liberty Natural Gas LLC Port Ambrose Liquefied Natural Gas Deepwater Port project for the importation of natural gas.

This deepwater port facility would be located 16.1 nautical miles southeast of Jones Beach, New York, 24.9 nautical miles east of Long Branch, New Jersey, and 27.1 nautical miles from the entrance to New York Harbor in a water depth of approximately 103 feet.

Liberty Natural Gas is proposing to construct, own, and operate this liquefied natural gas (LNG) deepwater port import facility, known as Port Ambrose, located in the New York Bight. The Port Ambrose facility will be located at a different proposed location and include a different design than the previous deepwater port license application submitted by Liberty Natural Gas in 2010. Port Ambrose would consist of two Submerged Turret Loading Buoys (STL Buoys) in federal waters.

LNG would be delivered from purpose-built LNG regasification vessels (LNGRVs), vaporized on site and delivered through the STL Buoys, flexible riser/umbilical, subsea manifold and lateral pipelines to a buried 18.8 nautical mile subsea mainline connecting to the existing Transco Lower New York Bay Lateral in New York State waters 2.2 nautical miles south of Long Beach, New York and 13.1 nautical miles east of Sandy Hook, New Jersey. The buoys would be lowered to rest on a landing pad when not in use and would also include a suction anchor mooring array.

The 145,000 cubic meter LNGRVs would have onboard closed-loop vaporization and metering and odorant capability. Each vessel would have three vaporization units capable of maximum send-out of 750 million standard cubic feet per day (MMscfd) (maximum pipeline system flow rate is 660 MMscfd with two buoys) with annual average expected to be 400 MMscfd. The LNGRVs have been designed to utilize a ballast water cooling system that will entirely re-circulate onboard the vessel during in-port operations, eliminating vessel discharges associated with regasification while at the port. Deliveries through Port Ambrose would be focused during peak demand winter and summer months, and it is anticipated that approximately 45 deliveries will occur each year.

MARAD and USCG said they are aware that Port Ambrose falls within the proposed area of interest for the Long Island—New York City Offshore Wind Collaborative wind energy project. This project will be acknowledged and considered in the cumulative impacts analysis section of the DEIS based on currently available information. If approved, the majority of the port and pipeline construction and installation would occur in 2017, with commissioning estimated to be in December 2017. 

About Barry Cassell 20414 Articles
Barry Cassell is Chief Analyst for GenerationHub covering coal and emission controls issues, projects and policy. He has covered the coal and power generation industry for more than 24 years, beginning in November 2011 at GenerationHub and prior to that as editor of SNL Energy’s Coal Report. He was formerly with Coal Outlook for 15 years as the publication’s editor and contributing writer, and prior to that he was editor of Coal & Synfuels Technology and associate editor of The Energy Report. He has a bachelor’s degree from Central Michigan University.