So many a short line could have re-used these.  They could have been re-purposed into modern units once again.  It's not like flying a DC-3 with propellers, they can work for many years to come.  Once they're gone, they're gone. 
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Sorry for my ranting & raving.  Mike, this is an amazing photo!  If the landscape weren't so barren, I would opt for both a poster & a puzzle of this line-up.  Curious as to the HP?
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