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.
Last Thursday, the Ohio Environmental Council and partner eco-groups staged a protest in Geauga County.
Geauga County is getting its first deep Utica shale well for natural gas.
The eco-groups want the Ohio Department of Natural Resources to toughen its rules to strengthen environmental protections.
Also involved in the Middlefield protest were the Buckeye Forest Council and the Network for Oil & Gas Accountability and Protection.
The protestors then traveled to the banks of Grand River, which is within two miles of the drilling site developed by Oklahoma-based Chesapeake Energy Corp. The environmentalists said the river, a state wild and scenic stream, could be at risk from the drilling.
The Parkman Township drilling will rely on hydraulic fracturing or fracking, the use of water, sand and select chemicals to free up more natural gas deep underground.