The North-West Pipeline is a 450mm diameter, fully welded steel pipeline which runs approximately 112km across country from Carrickfergus Co. Antrim to Coolkeeragh Co. Derry. The pipeline is designed to transmit 200,000 Standard Cubic Meters of Natural Gas per hour (2,027 MW) at a maximum pressure of 85bar. The pipeline design includes an off-take station and hot-tap from the Phoenix Transmission Pipeline, 5no. intermediate Block Valve installations which are designed to cater for future pressure reduction facilities or off-takes and a terminal pressure reduction facility in the grounds of the Coolkeeragh Power Station in Derry.

Fingleton McAdam, a joint venture company between Fingleton White and McAdam Design Ltd of Newtownards Co. Down, were commissioned by BGE (Northern Ireland), a subsidiary of Bord Gais Eireann, as Consulting Engineers for the design and construction of the pipeline. The scope of works included routing and feasibility studies for the pipeline, liaison with all relevant statutory and public bodies, submission of a planning application including Environmental Statement, safety studies, material procurement, tender appraisal, appointment of a construction contractor and supervision of construction, testing and commissioning.

The joint venture company have successfully managed the project to budget and programme over the 3 year project life span and achieved the targeted commissioning date of October 2004.