In 2010 Glen Perry, a petroleum engineer for Adira Energy, warned that including the Alberta Clipper pipeline owned by TransCanada's competitor Enbridge, there is an extensive overcapacity of oil pipelines from Canada. After completion of the Keystone XL line, oil pipelines to the U.S. may run nearly half-empty. The expected lack of volume combined with extensive construction cost overruns has prompted several petroleum refining companies to sue TransCanada. Suncor Energy hoped to recoup significant construction-related tolls, though the U.S. Federal Energy Regulatory Commission did not rule in their favor. According to "The Globe and Mail",