The ongoing Mariner East II project is an expansion of ME 1 and will run the entire length of Pennsylvania. Now when they were building it out in rural Pa nobody cared but now as it makes it's way into heavily populated Eastern Pa people who must not have been paying attention now find the line going through neighborhood back yards, school yards, parks under dams and areas known for sinkholes opening up and the contractor who's building it has already been fined for spills while building. So it's not as simple and safe as the industry tries to make the public think it is.
Moreover, this line transports natural gas liquids which are odorless and colorless and are heavier than air. yet it continues on it's merry way wherever the politically powerful gas industry wants it to go.