Pembina Pipeline Corp. launched an open season for capacity commitments on its anticipated Alliance expansion project.

Alliance Pipeline Ltd. is offering an estimated 400 MMcf/d of additional firm gas service, according to a March 28 announcement. Any winning shippers would enter agreements starting at 15 years.

Alliance would increase the capacity of its 2,391-mile system by approximately 25% by increasing compression and adding other facilities. Alliance's pipeline system draws gas supplies from British Columbia, Alberta and North Dakota, delivering approximately 1.6 Bcf/d to the Chicago market hub.

"The proposed expansion of Alliance pipeline will increase access to premium markets and improve our service offering to current and potential customers," said Jason Wiun, Pembina's senior vice president and COO of pipelines. Pembina owns a 50% interest in Alliance Pipeline.

The open season closes May 30.

If approved by the Federal Energy Regulatory Commission, the approximately $2 billion project would have a targeted start date in the fourth quarter of 2021.