Parts of it are already under construction, with the ultimate goal of carrying Canada's tar sands oil to refineries along the Gulf Coast, a project many lawmakers say would create needed jobs.

它的一部分已经在建设中，最终目标是将加拿大的焦油砂油运往墨西哥湾沿岸的炼油厂，许多立法者表示该项目将创造所需的就业机会。