An interesting set of power is working the Union Pacific’s Dolores Yard: SD60M 2368 (ex-UP 6213) and UPY GS21B 2759. SD60M 2368 has been retrofitted with oxidation catalyst aftertreatment, designed to convert carbon monoxide (CO) and hydrocarbons into carbon dioxide (CO2) and water, while the 2759 is a low-emissions diesel genset locomotive built by National Railway Equipment (NRE). Instead of a single prime mover, the NRE genset locomotive is powered by three separate 700 horsepower (522 kW) Cummins QSK19C engines providing a total power output of 2,100 horsepower (1,570 kW). Each engine could be individually started or shut off depending on how much power is needed, reducing overall diesel emissions and improving fuel efficiency. (Carson, California – August 13, 2008)
