It's not an American pipeline, it's a Canadian govt. pipeline, for one, and they used eminent domain laws to force it through. Less than 5% of the crap is is processed in the Gulf Coast refineries total input, and it cost three times more and produces less than 20% per bl equivalent in transportation fuel. It's crap the Canadians don't want to pump across their own lands, even though the line to tidewater for them would be a lot shorter than it is to Port Arthur.
All the XL does is cut across a corner, only shortens toe route a few miles, yet it runs across a major aquifier. Even the Republican governor of the state opposed it, it's unnecessary and the water is much more valuable to both local residents and the farmers and other businesses in the state. It's just another Big Boys Run Over Little Boys scam, which of course is why Wall Street and the GOP shills are all for it. It doesn't even knock a nickel off the costs per bl equivalent, if that.
Like I said, the Keystone to Port Arthur has been operating for years now, and what's more it started springing leaks early on, too, which shouldn't happen with a brand new pipeline, so they didn't even give a shit about building it right to begin with.