Allseas has been contracted to install a 690-kilometre gas pipeline offshore Mexico that will link two major ports.

The $4.5 billion Southeast Gateway Pipeline — which was sanctioned last month — is the first big gas infrastructure project to emerge from a strategic alliance between Calgary-based TC Energy and domestic state-owned utility CFE.

The 36-inch diameter pipeline will run south along the Gulf of Mexico coast from Tuxpan in Veracruz state, connecting the ports of Coatzacoalcos in Veracruz and Dos Bocas in Tabasco state.