Vinton Dome storage project targets growing Gulf Coast gas balancing market

A proposed underground natural gas storage project in southwest Louisiana is seeking federal approval to add 44.5 Bcf of high-deliverability working gas capacity to the Gulf Coast, positioning itself as a balancing hub for LNG export terminals, interstate pipelines and power generators.

Vinton Dome Storage Hub LLC has filed an application with the Federal Energy Regulatory Commission (FERC) for a certificate of public convenience and necessity to construct the Vinton Dome Storage Hub Project in Calcasieu Parish, Louisiana. The project would develop five solution-mined salt caverns capable of storing a total of 63.5 Bcf of natural gas, including 44.5 Bcf of working gas.

If approved, the project would be built in phases through the first half of the next decade. The developer is seeking FERC approval by January 2027, with construction of the storage facilities beginning in the third quarter of 2027. The first two storage caverns and associated pipeline infrastructure are scheduled to enter service in the second quarter of 2031, with the remaining caverns coming online in 2033 and 2035.

The project is intended to serve what Vinton Dome describes as rapidly growing demand for flexible natural gas storage along the Gulf Coast, where LNG export capacity continues to expand.

According to the filing, the facility will provide up to 2.0 Bcf/d of injection capability and as much as 2.75 Bcf/d of peak withdrawal capacity. In addition to traditional storage services, the hub is expected to offer parking, loaning and wheeling services for LNG exporters, interstate pipelines, local distribution companies, power generators and industrial gas users.

The application cites U.S. Energy Information Administration forecasts showing continued growth in LNG exports and pipeline exports to Mexico as a key driver for additional storage infrastructure.

Extensive compression and pipeline infrastructure

The project extends well beyond the underground storage caverns.

Plans call for construction of a 55,000-hp compressor station equipped with ten Caterpillar 3616 natural gas engines, each rated at 5,500 hp and driving Ariel reciprocating compressors. The bidirectional station will compress gas for injection into storage, withdraw and dehydrate stored gas for delivery to pipelines, and provide wheeling services between interconnected pipeline systems. Four dehydration units also are planned.

Supporting the storage facility will be approximately 33 miles of dual 24-in.-diameter bidirectional pipelines, consisting of the Northern and Eastern Headers and three laterals. Together they will connect the storage hub with 13 interstate pipeline interconnects, including Gulf Run Transmission, Tennessee Gas Pipeline, Texas Eastern, Transco, Florida Gas Transmission, Golden Pass Pipeline, Kinder Morgan Louisiana Pipeline, Creole Trail Pipeline, Sabine Pipe Line, Venture Global’s CP Express and other regional systems.

Each interconnect will include metering, regulation and communications equipment, allowing the facility to move gas between multiple transmission systems.

The storage caverns will be created by solution mining within the previously undeveloped Vinton Salt Dome.

Each cavern will provide approximately 8.9 Bcf of working gas capacity and 3.8 Bcf of base gas, for a total capacity of 12.7 Bcf. The caverns will extend from roughly 3,500 ft below ground to depths approaching 6,100 ft and will be supported by six groundwater supply wells, six Class II saltwater disposal wells and an adjacent cavern leaching plant.

The leaching facility will separate suspended solids from produced brine before disposal, while groundwater withdrawn from dedicated wells will be used to dissolve the salt and create the storage caverns.

Large construction footprint

Construction will temporarily affect approximately 676 acres, with about 273 acres remaining in permanent operation for pipelines, compressor facilities, access roads and storage infrastructure. Most pipeline routes will parallel existing utility corridors where practical to minimize new environmental impacts.

Once completed, the Vinton Dome Storage Hub would become one of the larger high-deliverability salt cavern storage facilities serving the Gulf Coast LNG corridor, providing operational flexibility for producers, pipeline operators and export terminals as U.S. natural gas demand continues to shift toward export markets.