Allseas, a U.S. offshore energy contractor, has completed its offshore pipelay work for the Southeast Gateway natural gas pipeline project in southeastern Mexico, the company announced on Thursday.

The 700-kilometer (435-mile) pipeline runs along the Gulf of Mexico coast, connecting the Mexican ports of Tuxpan, Coatzacoalcos and Dos Bocas. It is designed to supply natural gas to Mexico’s central and southeast regions and bolster existing Transportadora de Gas Natural de la Huasteca (TGNH) assets.

The TGNH assets include the Tamazunchale pipeline (370 kilometres), which has a capacity of 825 million cubic feet per day, or 8.5 billion cubic meters per year, between Naranjos and Tamazunchale and 630 million cubic feet per day, or 6.5 billion cubic meters per year, between Tamazunchale and El Sauz.

TGNH assets also included the Tula-Villa de Reyes pipeline (420 kilometres), which has a capacity of 886 million cubic feet per day, or 9.2 billion cubic meters per year, and the Tuxpan-Tula pipeline (276 kilometres), which has a capacity of 886 million cubic feet per day, or 9.2 billion cubic meters per year.

The Southeast Gateway project is being developed by TC Energy, a Canadian energy infrastructure group, in partnership with the Mexican state-owned utility Comisión Federal de Electricidad (CFE). Once operational by 2025, the pipeline is expected to have a capacity of 1.3 trillion cubic feet daily (13.4 billion cubic meters per year).