The Ohio Department of Natural Resources have approved four new Utica shale permits in Portage County.
The permits, all in Nelson Township, were requested by Mountaineer Keystone LLC.
That brings the number of active permits in Ohio to 485. Some older permits are expiring.
As of Dec. 29, 199 wells have been drilled in eastern Ohio with 45 wells in production.
A total of 29 drilling works are working in Ohio.
Carroll County remains No. 1 with 177 permits from 2010 to 2012.
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.