The U.S. Department of Justice in investigating Oklahoma-based Chesapeake Energy Corp. for possible environmental violations at three well sites in West Virginia.
CBS News reported that federal investigators are looking into possible criminal violations and other liabilities under the federal Clean Water Act.
The company, through a spokesman, said the investigation centers of moving dirt or rock without proper permits.
Penalties could be as high as $50,000 per day for each violation.
Chesapeake, in a filing with the federal Securities and Exchange Commission, that the state of West Virginia has issued compliance orders for alleged violations of the state's Dam Control and Safety Act at four structures built by Chesapeake.
Chesapeake Energy Corp,the Oklahoma-based firm is the No. 1 driller in Ohio.
Rig Count Interactive Map by Baker Hughes, an energy services company.
Shale Sheet Fracking, a Youngstown Vindicator blog.
The Ohio Environmental Council, a statewide eco-group based in Columbus.
Earthjustice, a national eco-group.
People's Oil and Gas Collaborative-Ohio, a grass-roots group in Northeast Ohio.
Concerned Citizens of Medina County, a grass-roots group.
No Frack Ohio, a Columbus-based grass-roots group.
Fracking: Gas Drilling's Environmental Threat by ProPublica, an online journalism site.
Pipeline, blog from Pittsburgh Post-Gazette on Marcellus shale drilling.
Allegheny Front, environmental public radio for Western Pennsylvania.