Suddenly, speed bumps that looked like they would slow construction of Sunoco Pipeline’s Mariner East 2 natural gas liquids (NGL) pipeline have turned into roadblocks. Last month, as the company drilled under a Pennsylvania waterway in order to lay the line, drilling mud surfaced. That halted drilling. This week, two judicial orders, one from the Pennsylvania Environmental Hearing Board, also halted the work. It could take weeks or longer for Sunoco to clear the legal hurdles....