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The Bay Runner Pipeline entered service during the third quarter, while FERC authorized 30.15 million tonnes per annum across Rio Grande LNG’s first five trains and NextDecade advanced Train 6 permitting.
Published by Allstream Insiders
Allstream Insiders Summary
NextDecade says the Bay Runner Pipeline reached in-service during the third quarter of 2026, marking a material feed-gas infrastructure milestone for its Rio Grande LNG facility near Brownsville, Texas. According to NextDecade’s October 29 announcement, the facility’s gas inlet facilities have also achieved ready-for-start-up status, and the company expects first gas into Rio Grande LNG before the end of 2026.
The company continues to target first LNG production from Train 1 in the second quarter of 2027 and substantial completion in the third quarter of 2027. NextDecade said that substantial-completion target is one quarter ahead of the guaranteed completion schedule in its engineering, procurement and construction contract with Bechtel.
The update also disclosed two regulatory milestones: FERC approved an uprate of the first five trains to 30.15 million tonnes per annum (MTPA), and the U.S. Army Corps of Engineers authorized Train 6 in September. Those developments add to the project’s construction and expansion progress, but Train 6 remains in development and has not reached a final investment decision.
Rio Grande LNG Project Tracker
| Asset or phase | Company-reported milestone | Current status | Reported schedule |
|---|---|---|---|
| Bay Runner Pipeline | Reached in-service | Operating milestone completed in third-quarter 2026 | In service |
| Rio Grande LNG Trains 1–5 | FERC-approved authorized capacity of 30.15 MTPA | Under construction; gas inlet facilities ready for start-up | First gas expected before year-end 2026; Train 1 first LNG expected in second-quarter 2027 |
| Train 6 | U.S. Army Corps of Engineers authorization received | In development and permitting | Final environmental impact statement expected in June 2027; company is targeting a second-half 2027 FID |
Bay Runner pipeline and gas-inlet readiness move the project closer to first gas
The in-service milestone for the Bay Runner Pipeline is the most immediate infrastructure development in the update. NextDecade reported that the pipeline entered service during the third quarter, while the Rio Grande LNG gas inlet facilities achieved ready-for-start-up status. Across the site, the company said systems are being commissioned to support initial hydrocarbon introduction before year-end.
Those milestones do not mean LNG production has begun. NextDecade continues to describe first gas as an expectation before year-end 2026 and first LNG from Train 1 as a second-quarter 2027 target. The distinction matters: in-service pipeline and inlet-facility milestones advance the feed-gas and commissioning sequence, while LNG production will depend on the completion and start-up of the liquefaction train.
Train 1 commissioning progresses as construction advances across the first five trains
NextDecade reported that Trains 1 and 2 were 79.7% complete overall at the end of September 2026, including 4.9% commissioning completion. The company said Train 1 electrical, mechanical and utility commissioning scopes are progressing; it also reported completion of Train 2’s main cryogenic heat-exchanger installation.
For the remaining trains, NextDecade reported overall completion of 55.2% for Train 3, 22.5% for Train 4 and 14.0% for Train 5 as of September. Train 3’s first compressor string was set, foundation pours began for the Train 4 main cryogenic rack, and Train 5 soil stabilization began, according to the company.
The combined Trains 1–5 scope is expected to include five liquefaction trains, four 180,000-cubic-meter full-containment LNG tanks, two jetty berthing structures and associated site infrastructure. The physical scope is being constructed under fully wrapped, lump-sum turnkey EPC contracts with Bechtel; the October update did not name new construction awards, equipment suppliers or procurement packages.
FERC uprate increases the authorized capacity of the first five trains
FERC approved NextDecade’s uprate request in September, raising the authorized liquefaction capacity of Rio Grande LNG’s first five trains from 27 MTPA to 30.15 MTPA. The authorization represents a regulatory capacity milestone for the trains already under construction.
NextDecade separately describes the combined expected LNG production capacity of Trains 1–5 as 30 MTPA. The 30.15-MTPA figure is the FERC-authorized capacity, while the 30-MTPA figure is the company’s stated expected production capacity. Neither figure should be read as confirmation that the full capacity is operating today.
Train 6 moves through permitting but remains a development-stage project
NextDecade said it received U.S. Army Corps of Engineers authorization for Train 6 in September, completing a key regulatory authorization required for construction. The company filed its Train 6 expansion application with FERC in May and said FERC’s final environmental impact statement is expected in June 2027.
The company is continuing commercialization discussions for Train 6 and is targeting a positive final investment decision in the second half of 2027. That timeline remains forward-looking: the October update does not establish a Train 6 FID, a construction start, definitive commercial agreements, financing commitments or an EPC award.
Allstream perspective: Commissioning and regulatory milestones create a clearer near-term watch list
NextDecade’s update contains several decision-useful milestones beyond a general quarterly construction recap: Bay Runner is in service, the gas inlet facilities are ready for start-up, FERC has approved the Trains 1–5 uprate and Train 6 has received a key Army Corps authorization. Together, they show the Rio Grande LNG project moving through feed-gas readiness, commissioning and expansion permitting on different timelines.
For contractors, equipment suppliers and service providers, the next material confirmations will be initial hydrocarbon introduction, first gas, Train 1 LNG production, Train 6 commercial agreements, the FERC environmental-review outcome and any future FID or project-specific awards. Until then, Bay Runner’s in-service status and the disclosed construction progress should not be treated as confirmation that all Rio Grande LNG phases are complete or that Train 6 has entered construction.
