Ok so explain to me why they would send tar sands oil all the way to Texas for it then to go to Asia, I just don't buy that. Why won't you consider comparative risks, going by rail is far more likely to cause an accident yet you blithely ignore that. Let me ask you a question would you rather that the US goes back to importing oil rather than being independent of the Middle East?
So why should the US take Canada's risk? The tar sands oil (bitumen) is being shipped by train across Canada to ports in Vancouver for shipment to Asia. It's not being shipped by train across the US. I'm sorry but for the US the cost/risk vs rewards are sketchy at best and not worth taking at worst.
Let me give you some of the reasons why I it has questionable viability. First Bitumen is a low quality product with high sulfur content.
To produce tar sand has to be excavated via open pit which creates lots of overburden that is hazardous waste for metals and VOC's. Treatment and disposal of the hazardous waste overburden is very costly.
The tar sands then has to be processed to remove the sand contaminant and processed into bitumen via a steam injection process. That adds cost.
The Bitumen product then has to be mixed with a diluent (ussually petroleum distillates) or it will be to viscous to transport via pipeline. That adds cost.
Even with the addition of diluents the bitumen is still too viscous to transport via pipeline thus the pipeline has to be heated. That adds cost. Also, if the heating of the pipeline fails and the bitumen becomes to viscous to flow that can cause back up pressure that will burst the pipeline. How do you assure the reliability of such a heating system in a 2,000+ mile pipeline?
The pipeline has to go all the way to the Gulf Coast because existing pipelines at existing refinaries flow in the opposite direction that the Keystone pipeline would flow. Which is an obvious distribution bottleneck problem.
Once reaching the refinary the bitumen has to be further processed to remove high sulfur content and other undesirable contaminants. That adds cost.
Then the bitumen has to be further refined into usable oil grade products. That adds cost.
So from Coal Sands, to Bitumen to Oil Product makes it expensive to produce and thus has a limited market unless crude oil prices for Brent Grade Oil are upwards to $100 a barrel.
And that's not even really going into the ecological, environmental and hazardous materials management issues involved.
Trust me on this. If the product being transported was sweet light crude oil, instead of bitumen, then this permitting issue would have been completed a long time ago.