So, if we build the pipeline, we'll have the construction jobs and then the maintenance and control jobs. We should also be collecting transit fees. If the Canadians want to run this pipeline through our country, they can pay us some sort of royalty, but not so much that it becomes uneconomical for them to use the pipeline. If the oil ends up being processed in the US, there are more jobs in that too. But there's also a strong chance that the oil will be exported, so we shouldn't count on refining jobs. The long-term benefits to this country may be limited to maintenance jobs and transit fees, so that's what we need to lock in.
There may be some strong reasons not to build the pipeline too. If the pipeline leaks and causes expensive environmental damage, there go all the profits! If there aren't profits, why the hell would we want it? But probably the pipeline can be built and operated safely. I don't know for sure because it's outside what I can readily research.
Other considerations, like how dirty the oil is, how much carbon pollution it causes, how the extraction may cause environmental damage to Canada--these considerations are less important than our national need for productive jobs. I wish it wasn't so, but I feel it is. We have lost so many of our productive jobs, and this project would replace some of them. These would be new US jobs and new foreign exchange flowing into the US, not just eating the lunch of some other part of the country, so we need this.
We should do this project and other projects that bring production back to the US. That's the only way to rebuild a strong economy. An economy based on service jobs and finance--not so good, as the past decade has shown us.