Do you have any idea how many gas or oil or gasoline pipelines go under rivers or other bodies of water in the United States?   There are literally hundreds of under-water crossings in multiple states--including Oregon.  

Going northbound, look off to the right just before you get to Butte Creek on I-5 before you get to the Lebanon exit.  There are little white posts that show where the pipeline is.  

You are like the Luddites who don't believe in global warming only your bias is linked to pipelines and the actual demonstrable science that they operate under.