A pair of pipeline projects intended to move natural gas from major US plays to export facilities on the US Gulf Coast has been given the green light to proceed.

US energy company Williams has reached a final investment decision on its Louisiana Energy Gateway pipeline, which would gather 1.8 billion cubic feet of gas per day from the Haynesville shale for delivery to “premium markets”.

Those markets, the company said, would include liquefied natural gas export facilities along the Louisiana coast.