Constructing greenfield pipelines is never easy — just ask any midstream developer you know — but building them across the breadth of Texas comes with its own unique challenges. There’s distance, for starters, and today’s massive associated gas growth in the Permian Basin is occurring more than 400 miles from the closest demand along the Gulf Coast. That makes the pipelines relatively expensive at somewhere near $2 billion a copy. Integrating Permian supply with Gulf Coast demand also requires a big network of pipelines along the coast, as the demand is spread out from Louisiana to Mexico. Few midstream companies have such a network. Kinder Morgan does, one reason why, in our view, the Gulf Coast Express project was the first — and to-date the only — greenfield project from the Permian to proceed with a final investment decision. In the race to be the next Permian natural gas relief valve pipeline, the same hurdles will have to be overcome. On Friday, news came that a group of four companies is planning the Whistler Pipeline, and a closer look at the project reveals it may be capable of meeting the challenges needed to make it a serious player in the Permian pipeline race. Today, we look at the details of the latest Permian natural gas pipeline project.