Giving Freight Rail Tracks A Boost
Published: Thursday, 21 May 2015 12:19
In Wisconsin, train tracks are having a ballast problem. Temperature and vibration can destabilize ballast over time, keeping it from safely transferring the weight of a loaded train to the soil below, draining water and preventing vegetation from crowding the tracks. Also, fine grains of frac sand are leaking from rail cars, accumulating in rail bed ballast and, during a rainstorm, turning into mushy, track-loosening mud.
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Frac Sand Sources in the United States
Published: Tuesday, 19 May 2015 14:45
By Mary Ellen Benson and Anna Burack Wilson, U.S. Geological Survey, Denver, Colorado
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