Navajo Mine Railroad E60

I heared that the Navajo Mine Railroad has scrapped all of its three E60 electrics they bought from Amtrak a few years ago.

What kind of engines do they use now? New electrics or diesels?

Thanks,

unused Mexican E-60s

Watched them truck Amtrak 966 and 968 to Lake Powell/Page from Bernallilo, NM in the fall of 1986. Assume they are going to or already have done the same with the Mexican units…