The Pegasus pipeline that ruptured in Mayflower Arkansas was not designed for transport of dilbit, or anything else at high pressure. It was originally a pipeline designed for conventional oil to be shipped from Texas to Illinois (and from there, to Canada). Exxon/Mobil reversed the pipeline 7 years ago in order to ship dilbet from Illinois to refineries in Texas. They did little or nothing to inspect or upgrade the pipeline to make sure it was safe at the higher pressures and volume planned for dilbet flow. A particularly stunning insult to all of us is that the Oil Spill Liability Trust Fund, used to pay for clean-ups, receives not a single dime from Exxon/Mobil for transport of dilbet, thanks to a tax loophole that deems dilbit "not oil". For more, see below the dilbet doughnut
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