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.
Gulfport Energy Corp. and MarkWest Utica EMG LLC have signed an agreement to build new gathering pipelines in eastern Ohio.
The pipelines to gather natural gas from Ohio's Utica shale will be in Harrison, Guernsey and Belmont counties under the letter of intent.
MarkWest Utica EMG is a joint venture between MarkWest Energy Partners LP and the Energy and Minerals Group.
The deal announced this week also includes MarkWest Utica processing the gas and natural gas liquids produced by Gulfport at MarkWest's proposed Harrison County processing complexes for natural gas and for liquids.
The deal is the latest that brings together a gas producer and a pipeline company as drillers seek to reduce processing costs and maximize the value of oil and liquids that bubble up with the cheaper gas.
Oklahoma-based Gulfport has acquired about 62,000 acres in eastern Ohio.
It expects to bring the Harrison, Guernsey and Belmont counties wells online in 2012