The DT-6-6-2000 was most popular with the Elgin, Joliet and Eastern Railway, who purchased 27 of the 46 locomotives produced. Between 1956 and 1962, all but two of these locomotives (#100 and #118) underwent a significant rebuilding program.
The DT-6-6-2000 was particularly well-suited to the Elgin, Joliet and Eastern Railway, which bought 27 out of the 46 locomotives produced. Between 1956 and 1962, all but two of these locomotives (#100 and #118) underwent a significant refurbishment.