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U.S. refiners want more Canadian oil, and pipeline companies are finding ways to get it to them. Companies are adding space to their congested oil export pipelines from Canada even as plans for bigger expansions and new lines face delays.

The stubborn, sharp rise in Canadian heavy crude prices finally may falter later this year, when swelling output overwhelms a pipeline system that will be lacking a key project producers had counted on, according to Deloitte.

BISMARCK, N.D. — The developer of the Dakota Access pipeline is gauging shippers’ interest in a possible expansion of the volume of crude oil moved through the pipeline from 500,000 barrels to 570,000 barrels per day, despite ongoing tribal efforts to shut the pipeline down.

TRAVERSE CITY, Mich. — Michigan Gov. Rick Snyder’s administration and Canadian pipeline giant Enbridge have agreed to replace twin 65-year-old crude oil pipes in a channel linking two of the Great Lakes with another that would run through a tunnel far below the lake bed.