Original sentence: 80 percent of the funding for the purchase of these new locomotives comes from a grant from the Carl Moyer Memorial Air Quality Standards Attainment Program at the Bay Area Air Quality Management District.In 2009 the railroad began a program to replace their existing fleet with new fuel efficent locomotives.Motive power for the California Northern had consisted of over a dozen GP15-1 and four SD9 locomotives built in the mid to late 1950's