Many operational, several retired due to wrecks, two preserved (one SD70ACe and one SD70MAC). The EMD SD70 is a series of diesel-electric locomotives manufactured by Electro-Motive Diesel. This locomotive family is an extension and improvement of the EMD SD60 series.
Rated at 4,300 hp, the SD70ACe was essentially a more environmentally friendly version of the builder’s SD70 series featuring EMD’s 16-cylinder model 710G3C-T2 engine, along with upgraded computer systems, electronics, and the builder’s famous self-steering trucks (the HTCR-II).
Although the SD70 could not regain EMD's dominance as the number one locomotive builder, it was still a very successful design with a few thousand different versions of the model operating around the country today (including the SD70M, SD70I, SD70M-2, SD70MAC, and SD70ACe).