An independent
review by the agency, made public Jan. 31, found that while the project would create about 2,000 short-term construction jobs over two years (or 3,900 if construction took only a year), actually running the pipeline would provide
just 50 long-term positions. It also would support another 40,000 "indirect" or "induced" jobs across the country during construction, ranging from canteen cars serving food along the pipeline route to factories manufacturing construction equipment for the project.
“That’s a similar amount of construction work to what’s necessary to build a medium-size mall, and after it’s built, far fewer permanent positions
http://www.usnews.com/news/articles/2014/03/10/experts-keystone-xl-pipeline-may-create-fewer-jobs-than-most-expect