At $1000000, that’ more than $1500 per bolt.
And how much would you charge to hang suspended under a bridge, hoist up drilling equipment, drill through 1/2”+ steel, insert a bolt and have another guy hoisted on the other side to hold the nut?
Oh - don’t forget the guys on the ground keeping you safe, and all the special equipment you need. Everyone on the project will probably need a 60-hour OSHA card too.
There are probably anti-corrosion and environmental issues as well.
$1500.00 sounds about right.
Union labor, no doubt.
$1500 to $2300 per bolt. Good gig if you can get it.