Detroit-Windsor Gondola proposal floated again?

[Danny]

OH NO! There goes the skyline.

[JBMcB]

Their proposal says the clearance under the cable car system will be 124', which is lower than the Gordie Howe's clearance of 138' [[and much lower than the Ambassador Bridge's ~150')

I assume they designed the Gordie Howe international bridge with the lowest possible clearance for modern freighters, so why is the cable car clearance lower? Seawaymax freighters can hit 116' over the water, which seems like it's cutting it awfully close.