About $18/hr. A Track Laborer is the bottom of the barrel, it only goes up from there. I make a few bucks more than a laborer by driving a truck.
If you can get on a system gang (the posibility of working on the entire UP track) you are paid an additional $1600/mo. BEYOND your salary, for traveling expenses. There's ALOT of system work in SLC right now due to a new intermodal yard that they're building just south of the airport. I believe it will be under construction for 2 yrs, so there's plenty of system jobs in that area.