Portland City commissioners walked out of their Earth Day hearing Wednesday after opponents of a proposed propane export terminal in North Portland staged a small demonstration in council chambers.

The council will vote soon on whether to amend zoning at the Port of Portland’s Terminal 6 to allow the propane terminal to build a pipeline over land that is currently zoned for conservation. The vote has not been scheduled, but opponents have vowed a long and loud campaign to derail the project, proposed by a Canadian company, Pembina Pipeline.

Wednesday’s protest shook up Mayor Charlie Hales, who expressed strong support for the $500 million terminal project when it was first announced last September, and claimed it met all environmental and safety standards before any analysis had been presented on that front.

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