Neptune LNG Terminal

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Neptune LNG Terminal is a mothballed LNG import terminal in United States.

Location

Table 1: Location details

Name	Location	Coordinates (WGS 84)
Neptune LNG Terminal	Boston, Massachusetts, United States	42.573468, -70.665422 (approximate)

The map below shows the approximate location of the terminal:

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Project Details

Table 2: Infrastructure details

mtpa = million tonnes per year

Name	Facility type	Status	Capacity	Total terminal capacity	Offshore	Associated infrastructure
Neptune LNG Terminal	import	mothballed	–	–	False	–

Table 3: Cost

Name	Facility type	Cost	Total known terminal costs
Neptune LNG Terminal	import	–	–

Financing

No financing data available.

Table 4: Project timeline

FID = Final Investment Decision, used by some developers to indicate a project will move forward

Name	Facility type	Status	Proposal year	FID year	Construction year	Operating year	Inactive year
Neptune LNG Terminal	import	mothballed	–	–	–	2010	2013 (mothballed)

Ownership

Table 5: Ownership

Name	Facility type	Status	Owners	Parent companies	Operator
Neptune LNG Terminal	import	mothballed	Mitsui O.S.K. Lines Ltd; Höegh Evi	Mitsui O.S.K. Lines Ltd; Morgan Stanley	–

Background

Neptune Deepwater Port is located in the Atlantic Ocean, approximately eight nautical miles south-southeast of Gloucester, Massachusetts, in Federal waters. The coordinates for the two submerged turret loading buoys are: STL Buoy A, Latitude 42°29′12.3″ N, Longitude 70°36′29.7″ W and STL Buoy B, Latitude 42°27′20.5″ N, Longitude 70°36′7.3″ W. Neptune can accommodate the mooring, connecting, and offloading of two LNG carries at one time. Neptune's operator plans to offload LNGCs by regasifying the liquefied natural gas (LNG) on board the vessels. The regasified gas is then transferred through two submerged turret loading buoys via a flexible riser leading to a seabed pipeline that ties into the Algonquin Gas Transmission Pipeline for transfer to shore.

The Neptune LNG facility was developed in 2010 by ENGIE, which also operated Distrigas at that time. It is capable of injecting about 0.4 bcf/day of gas into the pipeline system from a special regasification system on-board its delivery vessels. However, it has not been active since its start-up. The import facility had only received a few small shipments that year before sitting idle. Due to the facility's inability to receive a consistent supply of natural gas imports, Neptune requested the US Maritime Administration's authorization (MARAD) to temporarily suspend port operations for 5 years. Neptune LNG's request was approved in 2013.

In November 2021, MARAD received a written request from Neptune for authorization to extend the period of suspended operations at the Neptune Port. In the request, Neptune indicated that conditions within the Northeast region's natural gas market continue to impact the Neptune Port's ability to import LNG. As a result, the Neptune Port has remained inactive and will likely remain inactive for the foreseeable future. For these reasons, Neptune requested MARAD's authorization to formally suspend port operations for an additional period of three years. MARAD approved the request. The new suspension period became effective in June 2022, and extended until June 25. In August 2025, the suspension of operations at Neptune Port was extended again until December 31, 2027. As of August 2026, the operations at the facility have been suspended, and the terminal is still considered to be mothballed.

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Additional data

To access additional data, including an interactive map of LNG terminals, a downloadable dataset, and summary data, please visit the Global Gas Infrastructure Tracker on the Global Energy Monitor website.