TransCanada to pay landowners for pipeline cavein

Apr 22, 2011 Full story: KXMB-TV Bismarck

TransCanada to pay landowners for pipeline cave-in BILLINGS, Mont. An Alberta-based company that built a natural gas pipeline through a stretch of southeastern Montana has offered compensation to landowners for damage caused when parts of the trench caved in this spring.

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James Lewis

Saint Joseph, MO

#1 Apr 25, 2011
Cross country cave-in is normal for MT & ND when bacfilling during the snow season. Alrhough not recommended, the proceedure protects the integrity of the pipe itself. It is mostly a unsightly visual impact however it should have some oversight so plugs can be set for traffic or cattle untill full settlement is complete. To be concerned with removing the snow requires more risk to safety and integrity in most cases. basically the snow melts under the backfill on top and then the snow settles slowley around the pipe. Pipelines need room to flex when under hydrotest and to flex under the pressure of the snow gives more cushing then the melt slowly fills the voids around the pipe. Next, the void migrates to the top of the ditch line and a rebackfill fill the top void.

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