Enbridge Inc. said the start of construction on its Line 5 natural gas liquids and oil pipeline could be delayed until 2026 after the U.S. Army Corps of Engineers moved to extend the permitting process for its Michigan project.

Enbridge

The Army Corps made the decision to extend the permitting process for the four-mile Great Lakes Tunnel Project under the Straits of Mackinac by an additional two years after receiving hundreds of thousands of public comments. The agency had previously targeted this fall for completion.

Representatives for Enbridge wrote that the delay of the process could mean an even longer extension of its construction timeline for the $500 million project intended to maintain the flow of volumes into Michigan and Ontario.

“While we are supportive of a thorough,...