The bridges of Hennepin County

I’m just getting around to watching this video of the Southwest LRT alignment.  The alignment approved for preliminary engineering will have a 3,000-foot bridge (!!) among others, plus a tunnel or two.  I can’t quickly find the costs of these many bridges, but might they come anywhere close to $600 million?  And could there be a less-bridgey route on this western end of the line?  Just checking.