The Sandersville Railroad Company owns a fleet of modern diesel electric switcher locomotives built by the Electro Motive Division of General Motors Corporation (EMD) but their first Diesel Electric Locomotive was the Fairbanks-Morse H-12-44 numbered SAN 100 that's now been long retired.
The operators cab, auxiliary cab, diesel engine (prime mover), air compressor, and radiator were all removed from the frame, and a large concrete ballast block was installed along with a new long full length hood was installed that has electric powered traction motor blowers on each end to cool the 4 DC electric traction motors on each axle as it did when it was a regular engine.
The fuel tank of the engine was removed and it became a full road slug that now receives its power from whatever mother unit it is multi-unit (MU) connected to.
In 1994 the company bought an additional slug unit from Norfolk Southern that became the SAN 91 that has a shorter body and vertically mounted "tombstone" style headlights.
In 2018, NS began operating an evening yard switcher to switch inbound cars from Macon, Savannah, and Augusta.
The company also installed a state-of-the-art weigh-in-motion scale near its Waco Mill Yard in 2002 that weighs trains after being activated by a radio link from the locomotive.
It lets the crews know it's working by activating the yellow and red signals and by speaking a computer radio message over the road channel.
The Tarbutton family still runs the company daily and can be found in the main office in Sandersville during operations.