Machinist Federal Inspector Jason Roth, who is also the chairman of his local machinist union, inspects a locomotive at the J.R. Davis rail yard in Roseville. Ninety five percent of all California train traffic passes through this yard, so there is plenty of work to keep the 1,500 mechanics, electricians and operators busy. These modern engines can move 1 ton of cargo 500 miles on a single gallon of gas, but their mechanical components can take a beating. Brakes, for example, are changed every time an engine comes in for fuel — about every two weeks. After a million miles, the engines receive a complete overhaul.
— Christine Calvin