Don't mean to be picky, but construction trades are paying closer to $18.00 per hour (low end). The documents they present are great, then in a quarter you find out they are fake.
Also the CITY, AND STATE, have work centers for them with don't ask policy.
I too am noticing local and state work being done by illegals. Our own local and state governments refusing to obey the law. Who would have thunk?
My brother in Phoenix will not bid a job for less than $25.00 an hour and he has all the work he can handle.