Parti Quebecois Leader Pauline Marois is insisting the federal government pick up the complete tab for moving a rail line that cuts through Lac-Megantic.
Forty-seven people were killed and most of the community's downtown was destroyed last July after a fuel-laden train derailed and exploded.
Marois says moving the rail line falls under federal jurisdiction.
She is estimating the cost of relocating the train tracks at as much as $175 million.
The PQ leader made the comments as she announced her party's candidate for the local riding in the April 7 election.
The federal government has agreed to a 50-50 split with Quebec on the cleanup costs.