"Energy Transfer Partners LP's (ETP.N) Rover pipeline, the biggest natural gas pipeline under construction in the United States, received more bad news after West Virginia told the company to stop some work, citing environmental violations, regulators said on Monday.

The $4.2 billion pipeline already faces sanctions for violations in Ohio and a federal ban on drilling activity that has delayed the anticipated startup of the project's first phase to the late summer from July.

West Virginia's Department of Environmental Protection (DEP) issued the order to stop activity in certain areas on July 17, which was made public on Monday in a U.S. Federal Energy Regulatory Commission filing. The state, in the filing, noted sediment deposits and improper erosion controls, along with other violations."

Scott DiSavino reports for Reuters July 24, 2017. [2]