After reading about the Port of Tillamook Bay railroad in Trains, it makes me wonder why railroads decide to run 50 year old units still. Don't get me wrong, I love older units, but from a business prospective, it must cost a ton to keep these guys running. BNSF still has a fleet of older units running around America. Here is a link to a SD9 running on CSX - http://www.clevelandtrains.net/ngallery/albums/7.aspx

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