A "Pipeline Construction Ahead" sign is seen on the side of the road near an Energy Transfer Partners LP construction site for the Sunoco Inc. Mariner East 2 natural gas liquids pipeline project near Morgantown, Pennsylvania, U.S. on Aug. 4, 2017. The Pennsylvania Department of Environmental Protection has issued four notices of violation after "inadvertent" spills of drilling fluids associated with horizontal directional drilling for the project. Photographer: Charles Mostoller/Bloomberg via Getty Images
