Ahhh, the impetuousness of youth...
I haven't been on a const job for maybe thirty years---or forty---but from a lot of the posts I've been reading on these old-truck/ag/eqpmt sites, Michigan is pretty well closed for business in your (hopeful) line...
Ob's stimulus is supposed to be cranking up "shovel-ready" jobs, but I think you'll find that with a whole lot of const people working short hours, or laid off completely, every const outfit that hasn't gone to hispanics has a bunch of highly experienced people they can call in if a job opens up, and I would guess that everyone on this forum knows people who need a good job very badly...
This's no reflection on you; you've just graduated at an unfortunate time. No one's sure whether things are going to slowly--repeat, slowly--get better or go the rest of the way down to the basement--or the sub-basement...
My suggestion would be to make as many personal (face to face) contacts as you can, and not to be bashful about going back every month or so--you want people to see you want to find something and that you don't mind putting yourself out to do it... With sympathy, Bud
