Canada paid for the entire construction and will be giving 10% of the toll revenue to the US until the 90% cut of tolls pays for the construction cost, at which point the tolls will be split 50/50. The ownership of the bridge is equally split.
It's a ludicrously good deal for the US already. This likely comes down to the billionaire Republican private owner of the only other, old-ass bridge wanting to stall this one opening so he doesn't have to lower his own tolls.
) fought to stop the Gordie Howe bridge from being built because he didn't want to lose his monopoly.