Pennsylvania fined an energy company more than $30 million Friday and will allow it to resume construction on its problem-plagued natural gas pipelines.

The state Department of Environmental Protection issued one of its largest-ever civil penalties in the wake of an investigation that found Energy Transfer had violated numerous regulations during construction of the Revolution pipeline in western Pennsylvania. A 2018 landslide along the pipeline’s route in Beaver County triggered a gas explosion and fire that destroyed a home, a barn and several cars, and prompted an evacuation.

The settlement agreement between the department and Energy Transfer subsidiary ETC Northeast Pipeline LLC also lifts a statewide moratorium on construction permits imposed on Energy Transfer nearly a year ago.

The decision means that Energy Transfer will be allowed to resume construction on its troubled Mariner East pipeline network that transports natural gas liquids across southeastern Pennsylvania.

The company has incurred millions of dollars in fines and weathered several shutdown orders over Mariner East, primarily due to polluted waterways and drinking water wells. At least two criminal investigations involving Mariner East are underway.