Costain said gas is flowing through the upgraded terminal into the national grid.
The terminal was upgraded to accept and process gas produced from the new York field in Southern North.
The Easington terminal can now process stream up to 120 million cubic feet a day natural gas output from the York field. The facility already processes gas from the Rough gas storage field.
The GBP80m on-shore section of the York project involved Costain providing design, procurement, construction management and commissioning support services for the new process stream in and around the existing operational facility.
Costain project manager Mark Buckingham said, "We designed and installed a new gas receiving area, the new onshore York pipeline through the Easington site and a new process island inclusive of a Silica Gel drying operation along with a new emergency vent system for Easington site and York sales gas interface with the National Grid."
