B.C. Green Party Leader Andrew Weaver is calling for a provincial inquiry into the Port Mann Bridge project after a year long CBC News investigation raised questions about the projects oversight.

The B.C. government overpaid millions for the Port Mann Bridge project because there was no rigorous verification of invoicing, timing and completion of work, according to six sources at two separate auditing firms and hundreds of documents leaked to CBC News.

How do you research a story about the biggest transportation project in B.C. history, when no one attached to the project will speak on the record, and all you have are stacks of jargon-filled documents?