As Canadian Prime Minister Justin Trudeau considers whether to approve Teck Resources' Frontier oil sands project, roughly 20 others sit on the shelf as companies delay investment decisions hoping for new pipelines and higher prices.

FILE PHOTO: Rows of steam generators line a road at the Cenovus Energy Christina Lake SAGD project south of Fort McMurray

WINNIPEG, Manitoba: As Canadian Prime Minister Justin Trudeau considers whether to approve Teck Resources' Frontier oil sands project, roughly 20 others sit on the shelf as companies delay investment decisions hoping for new pipelines and higher prices.