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.
Bloomberg News on Tuesday reported that the condition of roads used by drillers and the heavy truck traffic are creating big problems in states including West Virginia, Pennsylvania and Texas.
That does not appear to be a big problem in Ohio where drillers have been working with local officials on road agreements in advance of drillers moving in.
The drillers are paying for major road upgrades on roads their trucks will use.
You can read the Bloomberg News story here.