OTTAWA -- Canada鈥檚 natural resources minister warns that an alternative to Enbridge鈥檚 Line 5 pipeline would be "messy, polluting and expensive."

鈥淭hat鈥檚 a contingency plan that I don鈥檛 want to have to bank on,鈥 Seamus O鈥橰egan told CTV News Channel鈥檚 Power Play on Tuesday.

He described that plan as involving thousands of 18-wheelers, boats on the St. Lawrence River and railway cars delivering crude.

Michigan Gov. Gretchen Whitmer previously ordered Line 5 to shutter on Wednesday, but Enbridge maintains it will keep fighting that directive.

The Canadian government filed an amicus brief in U.S. District Court for the Western District of Michigan in support of Enbridge.

Ottawa describes the pipeline as a 鈥渧ital piece of infrastructure.鈥

O鈥橰egan explains why he doesn鈥檛 want to rely on an alternative to Line 5 in the video at the top of the article.