Caption: Once making up the entirety of GO's locomotive fleet, by this time, the F59PH's were a minority. Here, F59PH 555 pushes GO 909 west at Sunnyside on a nice summer day in July 2010. Around this time, the L10L setup for the F59PH's was beginning. It would only be a few more months before F59PH's would no longer operate solo on trains. GO did end up keeping 8 F59PH's, 557-564, and rebuilt them. However, everything below that was retired. 555 only lasted a few more months, and was retired. It now operates with AMT as AMXX 1348. GO now operates the remaining F59PH's only in L10L consists, and primarily on the Barrie line, but sometimes operate on other lines, specifically train runs that aren't dedicated to have 12 car consists, of which all regularly scheduled Milton line trains do not fall in that category.