The Financial Post reports in its Friday, Aug. 25, edition that Trans Mountain is seeking a route change to its controversial pipeline after running into engineering challenges while drilling a tunnel in British Columbia, according to an Aug. 10 letter filed with the Canada Energy Regulator. A Bloomberg dispatch to the Post reports that the change faces opposition from an indigenous group, and if not approved, the pipeline's start date will be pushed back and its cost will "significantly increase" beyond initial estimates, government-owned Trans Mountain said in the filing. The new challenges add to delays and cost overruns that have dogged the project since it began more than a decade ago. The project's cost has more than quadrupled to $30.9-billion. The latest snafu involves a route change of about 1.3 kilometres of pipeline that lies in the traditional territory of the Stk'emlupsemc te Secwepemc Nation, or SSN. The tunnelling was a modification made to accommodate SSN's concerns, and the community wants to stick with it, said an Aug. 4 SSN letter to Trans Mountain. Bloomberg says Trans Mountain and SSN did not respond to a request for comment.