On Monday, the Ohio chapter of the Sierra Club filed a lawsuit asking that the Ohio Department of Natural Resources release information on drillling plans in Ohio's state parks and public lands.
The suit, filed in Columbus, says the state agency has ignored requests for public documents on drilling for natural gas on state lands.
Earlier requests had been made by the eco-group in October and again in November and February.
A ODNR spokesman told the Columbus Dispatch the agency is working to fill the requests and will make the information available.
A law enacted last September opens Ohio's state properties to drilling. Officials have been directed to develop lease terms for drilling companies.
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.