Altagas – Blair Creek Pipeline

Gas Liquids Engineering Ltd. (GLE) provided detailed design work and construction management support for the installation of an 8 km long sweet raw gas gathering pipeline, which loops an existing gathering line from Progress Energy’s c-89-G/94-B-16 wellsite to AltaGas’ Blair Creek Gas Plant within d-58-F/94-B-16. The line was designed to accommodate 20 MMSCF/d of multiphase well production (gas, condensate, and water) at a MOP of 9930 kPag (1440 psig). The project also included modifications at the c-89-G wellsite, pigging facilities, installation of a camelback riser near the midpoint of the right-of-way (to accommodate flow from Painted Pony Petroleum and interconnect with the existing AltaGas 6” gathering pipeline), and tie-ins at the Blair Creek Gas Plant. Project scope of the pipeline included:

  • 8 km (5 mile) long pipeline, 273.1 mm OD (10 NPS)
  • Maximum Operating Pressure (MOP) of 9930 kPag (1440 psig)
  • 1 Intermediate camelback riser
  • Pig sender + receiver
  • Full integration with AltaGas’ existing pipeline system
  • Re-routing to avoid archaeological sites discovered on the right-of-way
  • Two creek crossings