The leak from line 2A near Anthony Henday Drive and 92 Avenue, occurred at 3 p.m. Friday, and the spill was put into a privately-owned excavation pit where construction work was being done.

Enbridge clean up Strathcona County

“The line strike took place during construction activity by a third party contractor, unrelated to Enbridge but crossing Enbridge’s right of way,” said a statement from Enbridge. “The construction activity was being done by TransCanada Pipelines and its contractor Ledcor.”

The Enbridge pipeline control center shut down Line 2A, as well as nearby lines as a precaution.

The National Energy Board reported that they will assist the TSB as necessary with the investigation, saying "Our own review of the incident will determine if enforcement action necessary. If it is, we will not hesitate to do so. The NEB can potentially fine Enbridge or any culpable third parties under the NEB act, which will be part of the review from inspectors.”

Transportation Safety Board pipeline experts were investigating the cause. The TSB investigates incidents or mishaps involving pipelines that cross provincial or international borders and may make recommendations. Genevieve Corbin, a media relations specialist from the Transportation Safety Board, said two investigators were en-route to the scene and a pipeline expert was expected to be on scene Sunday.

A statement from TransCanada spokesperson Terry Cunha said the company was cooperating. No injuries were reported and Enbridge said there was no risk to public safety.