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BNSF & UP problems in powder river basin
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[quote]QUOTE: <i>Originally posted by bobwilcox</i> <br /><br />Does anyone know why the BNSF is putting down a layer of asphalt? I thought the idea was to get maximum drainage. A layer of asphalt does not make sense to me but I know next to nothing about track structures. <br />[/quote] <br /> <br />It was from the BNSF Reborn article in the Oct 2004 issue of Trains. There's a picture and caption titled Pounding The Pavement on page 47. They're using 6 inches of ashphalt as a sub-base to prevent dirt from working up into the ballast. There are other benefits for new track laying such as erosion control and better access for non-rail construction equipment. It doesn't seem practical for existing track unless they have to rebuild from the sub-roadbed up.
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